MESON Chess Problem Database
Problem Display
PID: 89827 (BB2n3/rr1pR3/3NN3/p3k3/7K/4nR2/Q5p1/b7 w - - 0 1)
Haring, Jacobus
Die Schwalbe, 1969
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rb1
- 2.Sc4#
- 2.Sf7#
- 1...Rb2
- 2.Sc4#
- 2.Sf7#
- 1...Rb3
- 2.Sc4#
- 2.Sf7#
- 1...Rb4+
- 2.Sc4#
- 1...Rb5
- 2.Sc4#
- 2.Sf7#
- 1...Rb6
- 2.Sc4#
- 2.Sf7#
- 1...Rc7
- 2.Sf7#
- 1...Rxb8
- 2.Sf7#
- 1...Bd4
- 2.Sc5#
- 2.Sg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Sd1
- 2.Rf5#
- 1...Sf1
- 2.Rf5#
- 1...Sc2
- 2.Rf5#
- 1...Sc4
- 2.Rf5#
- 1...Sg4
- 2.Rf5#
- 1...Sd5
- 2.Rf5#
- 1...Sf5+
- 2.Rxf5#
- 1...Rb1
- Tries
- 1.Sb5+?
- 1...Rc7
- 2.Sed4#
- 2.Sc5#
- 2.Sg5#
- 2.Sexc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Qxa1#
- 1...Rxb8
- 2.Sed4#
- 2.Sc5#
- 2.Sg5#
- 2.Sec7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Qxa1#
- 1...Sd6
- 2.Sed4#
- 2.Sc5#
- 2.Sg5#
- 2.Sec7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Sc7
- 2.Sed4#
- 2.Sc5#
- 2.Sg5#
- 2.Sexc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...d6
- 2.Sec7#
- 1...Ke4!
- 1...Rc7
- 1.Sf4+?
- 1...Kf6
- 2.Qf7#
- 1...Kd4!
- 1...Kf6
- 1.Bxb7?
- threat
- 2.Sc4#
- 2.Sf7#
- 2.Qxa1#
- 1...Sf5+
- 2.Rxf5#
- 1...Sxd6
- 2.Qxa1#
- 1...dxe6
- 2.Qxa1#
- 1...Sc7
- 2.Sf7#
- 1...g1Q
- 2.Sc4#
- 2.Sf7#
- 1...g1R
- 2.Sc4#
- 2.Sf7#
- 1...Bb2
- 2.Sc4#
- 2.Sf7#
- 2.Qxb2#
- 1...Bc3
- 2.Sc4#
- 2.Sf7#
- 1...Bd4
- 2.Sc4#
- 2.Sf7#
- 2.Sc5#
- 2.Sg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Sd1
- 2.Sc4#
- 2.Sf7#
- 2.Rf5#
- 2.Qd5#
- 1...Sc2
- 2.Sc4#
- 2.Sf7#
- 2.Rf5#
- 2.Qd5#
- 1...Sc4
- 2.Sxc4#
- 2.Sf7#
- 2.Rf5#
- 1...Sd5
- 2.Rf5#
- 2.Qxd5#
- 1...Rxb7!
- threat
- 1.Rf4?
- threat
- 2.Sf7#
- 1...Sf5+
- 2.Rxf5#
- 1...Sc4
- 2.Rf5#
- 1...Sxd6!
- threat
- 1.Qd5+?
- 1...Sxd5
- 2.Rf5#
- 1...Kxd5!
- 1...Sxd5
- 1.Qxa1+?
- 1...Rb2
- 2.Sc4#
- 2.Sf7#
- 2.Qxb2#
- 1...Kd5!
- 1...Rb2
- 1.Qb2+?
- 1...Kd5
- 2.Qb5#
- 1...Rxb2
- 2.Sc4#
- 2.Sf7#
- 1...Bxb2!
- 1...Kd5
- 1.Qd2?
- threat
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Rb4+
- 2.Sc4#
- 2.Sd4#
- 1...Sf5+
- 2.Rxf5#
- 1...Bd4
- 2.Qxd4#
- 1...Rc7
- 2.Sf7#
- 2.Sc5#
- 2.Sg5#
- 2.Sxc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Sd5
- 2.Rf5#
- 2.Qg5#
- 1...Sc7
- 2.Sxc7#
- 1...Sg7
- 2.Sxg7#
- 1...dxe6!
- threat
- 1.Qa4?
- threat
- 2.Qe4#
- 1...Rb4+
- 2.Sc4#
- 1...Sf5+
- 2.Rxf5#
- 1...Kd5
- 2.Qb5#
- 2.Qe4#
- 1...Rxb8
- 2.Sf7#
- 2.Qf4#
- 1...Sxd6
- 2.Sc7#
- 1...Rc7
- 2.Sf7#
- 2.Qf4#
- 1...Bd4
- 2.Qxd4#
- 1...Sc4
- 2.Rf5#
- 1...Sf6
- 2.Sf4#
- 1...Sc7!
- threat
- 1.Qxa5+?
- 1...Rb5
- 2.Sc4#
- 2.Sf7#
- 1...Sd5
- 2.Rf5#
- 1...Rxa5!
- 1...Rb5
- 1.Sb5+?
- Keys
- 1.Qc4!
- threat
- 2.Sf7#
- 2.Sd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Qe4#
- 1...Sf5+
- 2.Rxf5#
- 1...Rxb8
- 2.Sf7#
- 2.Qf4#
- 1...Sxc4
- 2.Rf5#
- 1...Sxd6
- 2.Sd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sc7#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...dxe6
- 2.Sf7#
- 2.Rxe6#
- 2.Qe4#
- 1...Rc7
- 2.Sf7#
- 2.Qf4#
- 1...Sc7
- 2.Sf7#
- 1...Rb4
- 2.Sf7#
- 2.Sd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Bd4
- 2.Sxd4#
- 2.Sc5#
- 2.Sg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 2.Qxd4#
- 1...Sd5
- 2.Sf7#
- 2.Rf5#
- 2.Qe4#
- 1...Sf6
- 2.Sf7#
- 2.Sd4#
- 2.Sf4#
- 2.Sc5#
- 2.Sg5#
- 2.Sg7#
- 2.Sd8#
- 2.Sf8#
- 1...Sg7
- 2.Sf7#
- 2.Sxg7#
- 2.Qe4#
- threat
- 1.Qc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 8
- Sets
- R(g);CHECK::B(H)+S(D),DCHECK
- R(g);::S(D)
- R(g);XB(H)::S(D)
- S(c);N_GUARD::R1(B)
- S(c);CHECK,N_GUARD::R1(B),XS(c)
- Tries
- Try
- S(D);CHECK
- Vars
- P(h);P_SPINP(h)::R(F)+S(E)
- Refutation
- K(e);P-FLIGHT,P_SPINR(g)
- Try
- S(E);CHECK
- Vars
- K(e);S_FLIGHT::QAR1(A)
- Refutation
- K(e);S_FLIGHT
- Try
- B(G);XR(g)
- Threat
- DUALS(3)
- Vars
- S(c);CHECK,N_GUARD::R1(B),XS(c)
- S(i);P_SPINS(i),XS(D)::QAB(A),XB(a)
- P(h);P_SPINP(h),XS(E)::QAB(A),XB(a)
- S(i);::S(D)
- Refutation
- R(f);XB(G)
- Try
- R(B);
- Threat
- B(H)+S(D),DCHECK
- Vars
- S(c);CHECK,N_GUARD::R1(B),XS(c)
- S(c);N_GUARD::R1(B)
- Refutation
- S(i);P_SPINS(i),XS(D)
- Try
- Q(A);CHECK
- Vars
- S(c);SBLOCK,XQ(A)::R1(B)
- Refutation
- K(e);P-FLIGHT,P_SPINR(g),XQ(A)
- Try
- Q(A);CHECK,XB(a)
- Refutation
- K(e);P-FLIGHT,P_SPINR(g)
- Try
- Q(A);CHECK
- Vars
- K(e);P-FLIGHT,P_SPINR(g)::QAR2(A)
- Refutation
- B(a);XQ(A)
- Try
- Q(A);
- Threat
- DUALS(6)
- Vars
- S(c);CHECK,N_GUARD::R1(B),XS(c)
- B(a);N_GUARD::QAB1(A),XB(a)
- S(i);::R(F)+S(E),XS(i)
- Refutation
- P(h);P_SPINP(h),XS(E)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- R(g);CHECK::B(H)+S(D),DCHECK
- S(c);CHECK,N_GUARD::R1(B),XS(c)
- S(i);P_SPINS(i),SBLOCK,XS(D)::R(F)+S(E)
- B(a);N_GUARD::QAB1(A),XB(a)
- S(c);N_GUARD::R1(B)
- S(i);SBLOCK::R(F)+S(E)
- Refutation
- S(i);
- Try
- Q(A);CHECK,XP(d)
- Vars
- S(c);P_SPINS(c)::R1(B)
- Refutation
- R(f);XQ(A)
- Try
- Actual
- Q(A);
- Threat
- DUALS(8)
- Vars
- S(c);CHECK,N_GUARD::R1(B),XS(c)
- S(c);N_GUARD,XQ(A)::R1(B)
- S(i);::S(D)
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).