MESON Chess Problem Database
Problem Display
PID: 91490 (8/3p4/2nK4/4B1p1/p1R1p1P1/Pk2P3/r1pQB3/RN2bN2 w - - 0 1)
Hartong, Jan
Niemeijer, Meindert
2nd Prize, Probleemblad, 1951
#2
11 + 9
| 6490 | yacpdb | 2009 |
| 14869 | British Championship Solving Ty. | 2011 |
SOLUTION
- SOUND
- Sets
- 1...Rxa1
- 2.Qxc2#
- 1...Rb2
- 2.Rc3#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...Bf2
- 2.Qc3#
- 1...Bg3
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sd4
- 2.Rb4#
- 1...Sa5
- 2.Rb4#
- 1...Sxe5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rxa1
- Tries
- 1.Sh2?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Sxe5
- 2.Rb4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bg3
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Bxd2!
- 1...Rxa1
- 1.Sg3?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxg3
- 2.Qc3#
- 1...Sxe5
- 2.Rb4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Bxd2!
- 1...Rxa1
- 1.Bd3?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...Sxe5
- 2.Rb4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bg3
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...exd3!
- 1...Rxa1
- 1.Bf3?
- 1...Kxc4
- 2.Qd5#
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...Sxe5
- 2.Rb4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bg3
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...exf3!
- 1...Kxc4
- 1.Bd4?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...Sxd4
- 2.Rb4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Se5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Bg3+!
- 1...Rxa1
- 1.Bf6?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...Se5
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Bg3+!
- 1...Rxa1
- 1.Bg7?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...Se5
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Bg3+!
- 1...Rxa1
- 1.Bh8?
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Rxa3#
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...Sd4
- 2.Rb4#
- 1...Se5
- 2.Rb4#
- 1...c1Q
- 2.Qxa2#
- 1...c1S
- 2.Rc3#
- 1...c1B
- 2.Rc3#
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Bg3+!
- 1...Rxa1
- 1.Rc5?
- threat
- 2.Bc4#
- 2.Qd5#
- 1...Rxa3
- 2.Bc4#
- 2.Rxa3#
- 1...Bxd2
- 2.Sfxd2#
- 2.Bc4#
- 1...Sxe5
- 2.Rb5#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...c1Q
- 2.Qxa2#
- 1...c1R
- 2.Qxa2#
- 1...Sb4
- 2.Bc4#
- 1...Sa5
- 2.Rb5#
- 1...Se7
- 2.Bc4#
- 2.Rb5#
- 1...Sd4!
- threat
- 1.Rxc6?
- threat
- 2.Bc4#
- 2.Rb6#
- 2.Qd5#
- 1...Rxa1
- 2.Bc4#
- 2.Qxc2#
- 2.Qd5#
- 1...Rxa3
- 2.Bc4#
- 2.Rxa3#
- 2.Rb6#
- 1...Bxd2
- 2.Sfxd2#
- 2.Bc4#
- 1...cxb1Q
- 2.Rc3#
- 1...cxb1S
- 2.Qxa2#
- 1...cxb1B
- 2.Rc3#
- 1...cxb1R
- 2.Rc3#
- 2.Qxa2#
- 1...c1Q
- 2.Rb6#
- 2.Qxa2#
- 1...c1R
- 2.Rb6#
- 2.Qxa2#
- 1...dxc6!
- threat
- 1.Qd3+?
- 1...Bc3
- 2.Qxc3#
- 1...exd3!
- 1...Bc3
- 1.Sh2?
- Keys
- 1.Bd1!
- 1...Kxc4
- 2.Qd5#
- 1...Rxa1
- 2.Qxc2#
- 1...Rxa3
- 2.Qxc2#
- 1...Bxd2
- 2.Sfxd2#
- 1...Sxe5
- 2.Rb4#
- 1...cxd1Q
- 2.Rc3#
- 1...cxd1S
- 2.Qxa2#
- 1...cxd1B
- 2.Rc3#
- 2.Qxa2#
- 1...cxd1R
- 2.Rc3#
- 1...Sd4
- 2.Rb4#
- 1...Rb2
- 2.Rc3#
- 1...Bf2
- 2.Qc3#
- 1...Bg3
- 2.Qc3#
- 1...Bh4
- 2.Qc3#
- 1...Sb4
- 2.Rxb4#
- 1...Sa5
- 2.Rb4#
- 1...Sa7
- 2.Rb4#
- 1...Se7
- 2.Rb4#
- 1...Sb8
- 2.Rb4#
- 1...Sd8
- 2.Rb4#
- 1...Kxc4
- 1.Bd1!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 6
- Sets
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- R(b);SBLOCK::R1(H)
- B(a);XQ(D)::S(C),XB(a)
- B(a);N_GUARD::QAR1(D)
- B(a);N_GUARD,P_PINB(J)::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- S(h);N_GUARD::R1(H)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- Tries
- Try
- S(C);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- B(a);N_GUARD,P_PINB(J)::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- B(a);XQ(D)
- Try
- S(C);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- B(a);N_GUARD,P_PINB(J),XS(C)::QAR1(D)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- B(a);XQ(D)
- Try
- B(E);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- B(a);N_GUARD,P_PINB(J)::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- P(f);XB(E)
- Try
- B(E);
- Vars
- K(d);OGATEB,S_FLIGHT,XR(H)::QAB1(D)
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- R(b);N_GUARD,XP(F)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- B(a);N_GUARD,P_PINB(J)::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- P(f);XB(E)
- Try
- B(J);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- S(h);N_GUARD::R1(H)
- Refutation
- B(a);CHECK
- Try
- B(J);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- B(a);CHECK
- Try
- B(J);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- B(a);CHECK
- Try
- B(J);
- Vars
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- P(c);OGATE::QAB1(D),XR(b)
- P(c);::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
- Refutation
- B(a);CHECK
- Try
- R(H);
- Threat
- DUALS(2)
- Vars
- S(h);N_GUARD,XB(J)::R(H)
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- P(c);OGATE::QAB1(D),XR(b)
- S(h);::B(E)
- S(h);N_GUARD::R(H)
- Refutation
- S(h);
- Try
- R(H);XS(h)
- Threat
- DUALS(3)
- Vars
- P(c);XS(B)::R1(H)
- P(c);OGATE,XS(B)::QAB1(D),XR(b)
- Refutation
- P(i);XR(H)
- Try
- Q(D);CHECK
- Vars
- B(a);N_GUARD,P_SPINB(a)::QAR1(D),XB(a)
- Refutation
- P(f);XQ(D)
- Try
- Actual
- B(E);P_PINP(c)
- Vars
- K(d);N_SPINP(c),OGATEB,S_FLIGHT,XR(H)::QAB1(D)
- R(b);N_GUARD,XR(A)::QAB1(D),XP(c)
- R(b);N_GUARD,XP(F)::QAB1(D),XP(c)
- B(a);XQ(D)::S(C),XB(a)
- S(h);N_GUARD,XB(J)::R1(H)
- P(c);N_SPINP(c),P_PINQ(D),XB(E)::R1(H)
- P(c);N_SPINP(c),OGATE,XB(E)::QAB1(D),XR(b)
- S(h);N_GUARD::R1(H)
- R(b);SBLOCK::R1(H)
- B(a);N_GUARD::QAR1(D)
- B(a);N_GUARD,P_PINB(J)::QAR1(D)
- S(h);N_GUARD::R1(H),XS(h)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).