MESON Chess Problem Database
Problem Display
PID: 40021 (4B3/1pP5/1pn1PN2/rNkPp3/1R1qp1K1/BPP1Q1p1/3Rn3/3r4 w - - 0 1)
Barnes, Barry Peter
Chess, 1956
#2
13 + 11
| 4199 | Barnes about Chess Problems | 2001 |
SOLUTION
- SOUND
- Sets
- 1...Qxe3
- 2.Sd7#
- 1...Rxb5
- 2.Rc4#
- 1...Sxb4
- 2.Bxb4#
- 2.cxb4#
- 2.c8Q#
- 2.c8R#
- 1...Sa7
- 2.Ra4#
- 2.Rc4#
- 1...Se7
- 2.Ra4#
- 2.Rc4#
- 1...Sb8
- 2.Ra4#
- 2.Rc4#
- 1...Sd8
- 2.Ra4#
- 2.Rc4#
- 1...Qxe3
- Tries
- 1.Sd6?
- threat
- 2.Sdxe4#
- 2.Sxb7#
- 2.Rc4#
- 2.Rb5#
- 1...Qxe3
- 2.Sxb7#
- 2.Rc4#
- 2.Rb5#
- 1...Rxa3
- 2.Sdxe4#
- 2.Sxb7#
- 1...Sxc3
- 2.Sxb7#
- 2.Rc4#
- 2.Rb5#
- 1...Sxb4
- 2.Sdxe4#
- 2.Sxb7#
- 2.Bxb4#
- 1...b5
- 2.Rxb5#
- 1...Rb5
- 2.Sdxe4#
- 2.Sxb7#
- 2.Rc4#
- 2.Rxb5#
- 1...Ra7
- 2.Sdxe4#
- 2.Rc4#
- 2.Rb5#
- 1...Sd8
- 2.Sdxe4#
- 2.Ra4#
- 2.Rc4#
- 2.Rb5#
- 1...Kxd6!
- threat
- 1.Bxc6?
- threat
- 2.Sxe4#
- 2.Sd7#
- 2.Ra4#
- 2.Rc4#
- 1...Qxe3
- 2.Sd7#
- 2.Ra4#
- 2.Rc4#
- 1...Rxa3
- 2.Sxe4#
- 2.Sd7#
- 2.Rc4#
- 1...Rxb5
- 2.Sxe4#
- 2.Rc4#
- 2.Rxb5#
- 1...Sxc3
- 2.Sd7#
- 2.Ra4#
- 2.Rc4#
- 1...Ra1
- 2.Sxe4#
- 2.Sd7#
- 2.Rc4#
- 1...Ra4
- 2.Sxe4#
- 2.Sd7#
- 2.Rxa4#
- 2.Rc4#
- 1...bxc6!
- threat
- 1.Ra4+?
- 1...Sb4
- 2.Bxb4#
- 2.cxb4#
- 2.c8Q#
- 2.c8R#
- 1...Kxb5!
- 1...Sb4
- 1.Rbxd4+?
- 1...Kxb5
- 2.Qxe2#
- 1...Sb4
- 2.Sxe4#
- 2.Bxb4#
- 2.Rc4#
- 2.cxb4#
- 2.c8Q#
- 2.c8R#
- 1...Rxa3!
- 1...Kxb5
- 1.cxd4+?
- 1...Sexd4
- 2.Rc2#
- 2.Qc3#
- 1...Scxd4
- 2.Ra4#
- 2.Rc4#
- 2.c8Q#
- 2.c8R#
- 1...exd4!
- 1...Sexd4
- 1.c4?
- threat
- 2.Sxe4#
- 2.Sd7#
- 1...Qxe3
- 2.Sd7#
- 1...Rxb5
- 2.Sxe4#
- 2.Rxb5#
- 1...Sc3
- 2.Sd7#
- 1...Sb8
- 2.Sxe4#
- 2.Ra4#
- 1...Rxa3!
- threat
- 1.Sd6?
- Keys
- 1.Qxe4!
- threat
- 2.Sd7#
- 1...Qxe4+
- 2.Sxe4#
- 1...Qxb4
- 2.Qc4#
- 1...Qxd5
- 2.Qxd5#
- 1...Rxb5
- 2.Rc4#
- 1...Sxb4
- 2.c8Q#
- 2.c8R#
- 1...Sb8
- 2.Rc4#
- threat
- 1.Qxe4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 1
- Sets
- Q(d);N_SPINQ(d),XQ(E)::S(K)
- R(f);SBLOCK,XS(H)::B(B)+R(F),DCHECK
- Tries
- Try
- S(H);
- Threat
- DUALS(4)
- Vars
- P(i);::B(B)+R(F),DCHECK,XP(i)
- Refutation
- K(g);N_SPINQ(d),S_FLIGHT,XS(H)
- Try
- B(M);XS(j)
- Threat
- DUALS(4)
- Refutation
- P(k);XB(M)
- Try
- R(F);CHECK
- Refutation
- K(g);N_SPINQ(d),P-FLIGHT,P_SPINS(j),XS(H)
- Try
- R(F);CHECK,XQ(d)
- Vars
- K(g);P-FLIGHT,P_SPINS(j),XS(H)::QAB(E),XS(b)
- Refutation
- R(f);XB(B)
- Try
- P(D);CHECK,XQ(d)
- Refutation
- P(h);P_SPINP(h),XP(D)
- Try
- P(D);
- Threat
- DUALS(2)
- Vars
- Q(d);N_SPINQ(d),XQ(E)::S(K)
- S(b);::S(K)
- Refutation
- R(f);XB(B)
- Try
- Actual
- Q(E);N_PINQ(d),P_SPINQ(E),XP(e)
- Threat
- S(K)
- Vars
- Q(d);CHECK,XQ(E)::S(K),XQ(d)
- Q(d);P_SPINQ(d),XR(F)::QAR1(E)
- Q(d);N_PINQ(E),XP(I)::QAR1(E),XQ(d)
- R(f);SBLOCK,XS(H)::B(B)+R(F),DCHECK
- S(j);P_SPINS(j),XR(F)::P=Q
- S(j);::B(B)+R(F),DCHECK
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