MESON Chess Problem Database
Problem Display
PID: 122518 (1r2r3/B1Q4b/1q1pp3/1pN5/3k4/7R/Bb5K/4R1N1 w - - 0 1)
Markovsky, Grigory F
Source?, 1982
#2
8 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qa5
- 2.Sxe6#
- 2.Qxd6#
- 1...Qxc5
- 2.Qxd6#
- 1...Qxa7
- 2.Qxd6#
- 1...Qxc7
- 2.Sxe6#
- 1...Qa6
- 2.Sxe6#
- 1...Qc6
- 2.Sxe6#
- 1...Qb7
- 2.Sxe6#
- 2.Sxb7#
- 1...Rc8
- 2.Sxe6#
- 1...Rd8
- 2.Sxe6#
- 1...Rf8
- 2.Sxe6#
- 1...Rg8
- 2.Sxe6#
- 1...Rh8
- 2.Sxe6#
- 1...Bc3
- 2.Sf3#
- 1...Bd3
- 2.Rxd3#
- 1...Be4
- 2.Rxe4#
- 1...Bg8
- 2.Re4#
- 2.Rd3#
- 1...dxc5
- 2.Qe5#
- 1...d5
- 2.Se2#
- 2.Sb3#
- 1...e5
- 2.Se2#
- 1...Qa5
- Tries
- 1.Sb7?
- threat
- 2.Bxb6#
- 2.Qxb6#
- 2.Qxd6#
- 1...Qxa7
- 2.Qxd6#
- 1...Rxb7
- 2.Qxd6#
- 1...Red8
- 2.Bxb6#
- 2.Qxb6#
- 1...Qc5
- 2.Qxd6#
- 1...Rbc8
- 2.Bxb6#
- 2.Qxd6#
- 1...Rbd8
- 2.Bxb6#
- 2.Qxb6#
- 1...Rec8
- 2.Bxb6#
- 2.Qxd6#
- 1...Ba3
- 2.Qc3#
- 1...Bd3
- 2.Sf3#
- 2.Bxb6#
- 1...d5
- 2.Bxb6#
- 2.Qe5#
- 2.Qxb6#
- 1...Be4!
- threat
- 1.Bxb6?
- threat
- 2.Sxe6#
- 2.Sb7#
- 2.Qxd6#
- 1...dxc5
- 2.Bxc5#
- 2.Qe5#
- 2.Qd6#
- 2.Qxc5#
- 2.Qd7#
- 1...Bd3
- 2.Sxe6#
- 2.Sb7#
- 2.Rxd3#
- 1...Be4
- 2.Rxe4#
- 1...Rb7
- 2.Sxe6#
- 2.Sxb7#
- 2.Qxd6#
- 1...Rbd8
- 2.Sd3#
- 2.Sa4#
- 2.Sa6#
- 2.Sxe6#
- 2.Sb7#
- 2.Sd7#
- 1...Red8
- 2.Sxe6#
- 2.Sb7#
- 1...Ba3
- 2.Sxe6#
- 2.Qxd6#
- 1...d5
- 2.Se2#
- 2.Sb3#
- 2.Sxe6#
- 2.Sb7#
- 2.Qe5#
- 1...e5
- 2.Se2#
- 2.Se6#
- 2.Sb7#
- 2.Qxd6#
- 1...Rxb6!
- threat
- 1.Ree3?
- threat
- 2.Se2#
- 1...Be4
- 2.Rxe4#
- 1...Bd3!
- threat
- 1.Rxe6?
- threat
- 2.Se2#
- 1...Bd3
- 2.Rxd3#
- 1...Rxe6!
- threat
- 1.Ra3?
- threat
- 2.Sf3#
- 1...Be4
- 2.Rxe4#
- 1...Qc6
- 2.Sxe6#
- 1...Qb7
- 2.Sxe6#
- 2.Sxb7#
- 1...Rf8
- 2.Sxe6#
- 1...Bxa3!
- threat
- 1.Rhe3?
- threat
- 2.Sf3#
- 1...Bd3
- 2.Rxd3#
- 1...Qc6
- 2.Sxe6#
- 1...Qb7
- 2.Sxe6#
- 2.Sxb7#
- 1...Rf8
- 2.Sxe6#
- 1...Be4!
- threat
- 1.Qxb6?
- threat
- 2.Sxe6#
- 2.Sb7#
- 2.Qxd6#
- 1...dxc5
- 2.Qxc5#
- 2.Qd6#
- 1...Bd3
- 2.Rxd3#
- 1...Be4
- 2.Rxe4#
- 1...Rb7
- 2.Sxe6#
- 2.Sxb7#
- 2.Qxd6#
- 1...Rbc8
- 2.Sxe6#
- 2.Qxd6#
- 1...Rbd8
- 2.Sa4#
- 2.Sa6#
- 2.Sxe6#
- 2.Sb7#
- 2.Sd7#
- 1...Rec8
- 2.Sxe6#
- 2.Qxd6#
- 1...Red8
- 2.Sxe6#
- 2.Sb7#
- 1...Ba3
- 2.Sxe6#
- 2.Qxd6#
- 1...d5
- 2.Sxe6#
- 2.Sb7#
- 1...e5
- 2.Se2#
- 2.Se6#
- 2.Sb7#
- 2.Qxd6#
- 1...Rxb6!
- threat
- 1.Sb7?
- Keys
- 1.Sd7!
- threat
- 2.Qxd6#
- 1...Ba3
- 2.Qc3#
- 1...Bd3
- 2.Sf3#
- 1...Be4
- 2.Se2#
- 1...d5
- 2.Qe5#
- threat
- 1.Sd7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 13
- Sets
- Q(d);N_GUARD,P_SPINQ(d),XS(F)::QAR2(H),XP(e)
- Q(d);N_GUARD,XB(G)::QAR2(H),XP(e)
- Q(d);XQ(H)::B(G)+S(F),DCHECK,XP(f)
- Q(d);::B(G)+S(F),DCHECK,XP(f)
- R(i);N_GUARD::S(F),XP(f)
- B(a);SBLOCK::S(B)
- B(g);N_GUARD::R1(E),XB(g)
- B(g);N_GUARD::R1(A),XB(g)
- P(e);OGATE,XS(F)::QAB1(H)
- P(f);SBLOCK::S(B)
- Tries
- Try
- S(F);P_PINQ(d)
- Threat
- DUALS(3)
- Vars
- Q(d);N_SPINQ(d),XB(G)::QAR2(H),XP(e)
- R(h);XS(F)::QAR2(H),XP(e)
- Q(d);::QAR2(H),XP(e)
- B(a);N_GUARD::QAB1(H)
- Refutation
- B(g);
- Try
- B(G);XQ(d)
- Threat
- DUALS(3)
- Vars
- B(g);N_GUARD::R1(A),XB(g)
- Refutation
- R(h);XB(G)
- Try
- R(A);
- Threat
- S(B)
- Vars
- B(g);N_GUARD::R1(A),XB(g)
- Refutation
- B(g);
- Try
- R(A);XP(f)
- Threat
- S(B)
- Vars
- B(g);N_GUARD::R1(E),XB(g)
- Refutation
- R(i);XR(A)
- Try
- R(E);
- Threat
- S(B)
- Vars
- B(g);N_GUARD::R1(A),XB(g)
- Q(d);::B(G)+S(F),DCHECK,XP(f)
- R(i);N_GUARD::S(F),XP(f)
- Refutation
- B(a);XR(E)
- Try
- R(E);
- Threat
- S(B)
- Vars
- B(g);N_GUARD::R1(E),XB(g)
- Q(d);::B(G)+S(F),DCHECK,XP(f)
- R(i);N_GUARD::S(F),XP(f)
- Refutation
- B(g);
- Try
- Q(H);XQ(d)
- Threat
- DUALS(3)
- Vars
- B(g);N_GUARD::R1(E),XB(g)
- B(g);N_GUARD::R1(A),XB(g)
- Refutation
- R(h);XQ(H)
- Try
- Actual
- S(F);P_PINQ(d)
- Threat
- QAR2(H),XP(e)
- Vars
- B(a);N_GUARD::QAB1(H)
- B(g);SBLOCK::S(B)
- P(e);OGATE::QAB1(H)
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