MESON Chess Problem Database
Problem Display
PID: 196984 (1N1B4/1R6/qN6/krr2p2/p1B5/2P5/8/4QK2 w - - 0 1)
Dobbs, Gilbert S
Good Companions, 1919
#2
8 + 6
| 6490 | yacpdb | 2019 |
SOLUTION
- SOUND
- Sets
- 1...Qxb6
- 2.Ra7#
- 1...Qa7
- 2.Rxa7#
- 1...Rb4
- 2.cxb4#
- 1...Rxc4
- 2.Sxc4#
- 1...Rd5
- 2.Sc6#
- 1...Re5
- 2.Sc6#
- 1...Rc6
- 2.Sxc6#
- 1...Qxb6
- Tries
- 1.Ba2?
- threat
- 2.Sc4#
- 1...Rxb6+
- 2.c4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Be2?
- threat
- 2.Sc4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxb6
- 2.c4#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Bd3?
- threat
- 2.Sc4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxb6
- 2.c4#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Bd5?
- threat
- 2.Sc4#
- 1...Rxb6+
- 2.c4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Be6?
- threat
- 2.Sc4#
- 1...Rxb6+
- 2.c4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Bf7?
- threat
- 2.Sc4#
- 1...Rxb6+
- 2.c4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Bg8?
- threat
- 2.Sc4#
- 1...Rxb6+
- 2.c4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxc3
- 2.Sc6#
- 1...Rc4
- 2.Sxc4#
- 1...a3!
- threat
- 1.Ba2?
- Keys
- 1.Bb3!
- threat
- 2.Sc4#
- 1...Rxb6+
- 2.c4#
- 1...Qxb6
- 2.Ra7#
- 1...Rxc3
- 2.Sc6#
- 1...axb3
- 2.Qa1#
- 1...Rc4
- 2.Sxc4#
- threat
- 1.Bb3!
This is a version of 21467
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- Q(f);OGATEB::R(F),XQ(f)
- R(c);OGATE,P_PINB(D)::P(C),XR(c)
- R(d);XB(D)::B(H)+S(E),DCHECK,XR(d)
- R(d);N_GUARD::S(G)
- R(d);N_GUARD::S(G),XR(d)
- Tries
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(E)::QAB(A)+P(C)
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(c);N_GUARD,P_PINB(D),P_SPINR(c),XS(E)::QAB(A)+P(C)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(c);N_GUARD,P_PINB(D),P_SPINR(c),XS(E)::QAB(A)+P(C)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(E)::QAB(A)+P(C)
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(E)::QAB(A)+P(C)
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(E)::QAB(A)+P(C)
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(E)::QAB(A)+P(C)
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- R(d);::B(H)+S(E),DCHECK,XR(d)
- Refutation
- P(a);
- Try
- Actual
- B(D);
- Threat
- B(H)+S(E),DCHECK
- Vars
- R(c);CHECK,N_GUARD,P_SPINR(c),XS(E)::QAB(A)+P(C)
- Q(f);OGATEB,P_SPINQ(f),XS(E)::R(F)
- R(d);N_GUARD,P_SPINR(d),XP(C)::S(G)
- P(a);OGATEB,XB(D)::QAR(A)
- R(d);::B(H)+S(E),DCHECK,XR(d)
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