MESON Chess Problem Database
Problem Display
PID: 84434 (qB6/3B4/2p2p1K/5R2/1p1pk3/Q1P5/2PRbPP1/1Nb5 w - - 0 1)
Brown, David Leo
Canadian Chess Chat, 1982
#2
11 + 8
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bb2
- 2.Rxe2#
- 2.Rxd4#
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxa3
- 2.Rxe2#
- 2.Rxd4#
- 1...Bd3
- 2.cxd3#
- 1...Bf3
- 2.gxf3#
- 1...bxc3
- 2.Qe7#
- 1...b3
- 2.Qe7#
- 1...dxc3
- 2.Rf4#
- 1...d3
- 2.Qxb4#
- 1...c5
- 2.Qxa8#
- 1...Bb2
- Tries
- 1.Kg6?
- threat
- 2.Rxd4#
- 1...Bxd2
- 2.Sxd2#
- 1...bxc3
- 2.Qe7#
- 1...dxc3
- 2.Rf4#
- 1...Qa7
- 2.Bxc6#
- 1...Bd3
- 2.cxd3#
- 1...d3
- 2.Qxb4#
- 1...c5
- 2.Qxa8#
- 1...Bh5+!
- threat
- 1.Kg7?
- threat
- 2.Rxd4#
- 1...Bxd2
- 2.Sxd2#
- 1...bxc3
- 2.Qe7#
- 1...dxc3
- 2.Rf4#
- 1...Bd3
- 2.cxd3#
- 1...d3
- 2.Qxb4#
- 1...c5
- 2.Qxa8#
- 1...Qa7!
- threat
- 1.Kh7?
- threat
- 2.Rxd4#
- 1...Bxd2
- 2.Sxd2#
- 1...bxc3
- 2.Qe7#
- 1...dxc3
- 2.Rf4#
- 1...Bd3
- 2.cxd3#
- 1...d3
- 2.Qxb4#
- 1...c5
- 2.Qxa8#
- 1...Qa7!
- threat
- 1.Be6?
- threat
- 2.Rf4#
- 1...Bxd2+
- 2.Sxd2#
- 1...Qxb8!
- threat
- 1.Re5+?
- 1...Kf4
- 2.Rxd4#
- 1...fxe5!
- 1...Kf4
- 1.Qxc1?
- threat
- 2.Rxe2#
- 2.Rxd4#
- 1...bxc3
- 2.Rxe2#
- 1...dxc3
- 2.Rf4#
- 1...Qa7
- 2.Rxe2#
- 1...Qa6
- 2.Rxd4#
- 1...Bd1
- 2.Rxd4#
- 1...Bf1
- 2.Rxd4#
- 1...Bd3
- 2.cxd3#
- 1...Bf3
- 2.Rxd4#
- 2.gxf3#
- 1...Bc4
- 2.Rxd4#
- 1...Bg4
- 2.Rxd4#
- 1...Bb5
- 2.Rxd4#
- 1...Bh5
- 2.Rxd4#
- 1...Ba6
- 2.Rxd4#
- 1...c5
- 2.Rxe2#
- 1...d3!
- threat
- 1.Qa7?
- threat
- 2.Qxd4#
- 1...Bxd2+
- 2.Sxd2#
- 1...dxc3
- 2.Rf4#
- 2.Qe3#
- 2.Qd4#
- 1...d3
- 2.Qe3#
- 2.Qd4#
- 1...c5
- 2.Qxa8#
- 1...Qxa7!
- threat
- 1.c4?
- threat
- 2.Rf4#
- 1...Bxd2+
- 2.Sxd2#
- 1...Bxc4
- 2.Qf3#
- 2.f3#
- 1...Qxb8!
- threat
- 1.Kg6?
- Keys
- 1.Rg5!
- threat
- 2.Rxd4#
- 1...Bxd2
- 2.Sxd2#
- 1...bxc3
- 2.Qe7#
- 1...dxc3
- 2.Bf5#
- 1...Qa7
- 2.Bxc6#
- 1...Bd3
- 2.cxd3#
- 1...d3
- 2.Qxb4#
- 1...c5
- 2.Qxa8#
- threat
- 1.Rg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 2
- Sets
- B(a);CHECK,XR(C)::S(A),XB(a)
- B(b);OGATE::P(B),XB(b)
- B(b);OGATE::P(E),XB(b)
- P(c);OGATE,XP(G)::QAR(F)
- P(c);OGATE::QAR(F)
- P(d);XP(G)::R1(H)
- P(d);OGATEB::QAR(F),XP(c)
- P(f);OGATEB::QAB(F),XQ(h)
- Tries
- Try
- K(I);N_SPINR(C),P-FLIGHT
- Threat
- R1(C),XP(d)
- Vars
- B(a);XR(C)::S(A),XB(a)
- P(c);OGATE,XP(G)::QAR(F)
- P(d);XP(G)::R1(H)
- Q(h);N_GUARD::B(J),XP(f)
- B(b);OGATE::P(B),XB(b)
- P(d);OGATEB::QAR(F),XP(c)
- P(f);OGATEB::QAB(F),XQ(h)
- Refutation
- B(b);CHECK
- Try
- K(I);N_SPINR(C),S_FLIGHT
- Threat
- R1(C),XP(d)
- Vars
- B(a);XR(C)::S(A),XB(a)
- P(c);OGATE,XP(G)::QAR(F)
- P(d);XP(G)::R1(H)
- B(b);OGATE::P(B),XB(b)
- P(d);OGATEB::QAR(F),XP(c)
- P(f);OGATEB::QAB(F),XQ(h)
- Refutation
- Q(h);P_PINB(J)
- Try
- K(I);N_SPINR(C),P-FLIGHT
- Threat
- R1(C),XP(d)
- Vars
- B(a);XR(C)::S(A),XB(a)
- P(c);OGATE,XP(G)::QAR(F)
- P(d);XP(G)::R1(H)
- B(b);OGATE::P(B),XB(b)
- P(d);OGATEB::QAR(F),XP(c)
- P(f);OGATEB::QAB(F),XQ(h)
- Refutation
- Q(h);P_PINB(J)
- Try
- B(J);
- Threat
- R1(H)
- Vars
- B(a);CHECK,XR(C)::S(A),XB(a)
- Refutation
- Q(h);XB(K)
- Try
- R(H);CHECK
- Vars
- K(e);N_PINR(C),P-FLIGHT::R(C),XP(d)
- Refutation
- P(g);XR(H)
- Try
- Q(F);N_SPINR(C),XB(a)
- Threat
- DUALS(2)
- Vars
- P(c);XP(G)::R(C),XB(b)
- P(d);XP(G)::R1(H)
- Q(h);::R(C),XB(b)
- Q(h);::R1(C),XP(d)
- B(b);::R1(C),XP(d)
- B(b);OGATE::P(B),XB(b)
- P(f);::R(C),XB(b)
- Refutation
- P(d);
- Try
- Q(F);
- Threat
- QAR1(F),XP(d)
- Vars
- B(a);CHECK,XR(C)::S(A),XB(a)
- P(f);OGATEB::QAB(F),XQ(h)
- Refutation
- Q(h);XQ(F)
- Try
- P(G);
- Threat
- R1(H)
- Vars
- B(a);CHECK,XR(C)::S(A),XB(a)
- Refutation
- Q(h);XB(K)
- Try
- Actual
- R(H);N_SPINR(C)
- Threat
- R1(C),XP(d)
- Vars
- B(a);P_PINR(H),XR(C)::S(A),XB(a)
- P(c);OGATE,XP(G)::QAR(F)
- P(d);XP(G)::B(J)
- Q(h);N_GUARD::B(J),XP(f)
- B(b);OGATE::P(B),XB(b)
- P(d);OGATEB::QAR(F),XP(c)
- P(f);OGATEB::QAB(F),XQ(h)
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