MESON Chess Problem Database
Problem Display
PID: 53847 (BBK5/8/1p5p/3R1N1r/n1N1k3/2rR3b/Q1pq2Pn/8 w - - 0 1)
Ellerman, Arnoldo
Chess, 1943
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qc1
- 2.R3d4#
- 1...Qe1
- 2.R3d4#
- 1...Qf4
- 2.R3d4#
- 1...Qg5
- 2.R3d4#
- 1...Qe2
- 2.R3d4#
- 1...Ra3
- 2.Sxd2#
- 1...Rb3
- 2.Sxd2#
- 1...Rxc4+
- 2.Qxc4#
- 1...Rxf5
- 2.R5d4#
- 1...Bxg2
- 2.Sg3#
- 1...Bxf5+
- 2.Rd7#
- 1...Sf3
- 2.gxf3#
- 1...Sg4
- 2.Sg3#
- 1...Sc5
- 2.Sxd2#
- 1...Qc1
- Tries
- 1.Rxd2?
- threat
- 2.R2d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Rxc4+
- 2.Rc5#
- 2.Qxc4#
- 1...Bxf5+
- 2.Rd7#
- 1...Rxf5
- 2.R2d4#
- 2.R5d4#
- 1...Bxg2
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Sf3
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Sc5
- 2.R2d4#
- 2.Rxc5#
- 1...b5
- 2.R2d4#
- 2.Rxb5#
- 2.Rc5#
- 1...Rd3!
- threat
- 1.Re3+?
- 1...Rxe3
- 2.Sxd2#
- 1...Qxe3!
- 1...Rxe3
- 1.Qxc2?
- threat
- 2.Re3#
- 2.R3d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Rxc4+
- 2.Rc5#
- 2.Qxc4#
- 1...Bxf5+
- 2.Rd7#
- 1...Qxc2
- 2.R3d4#
- 1...Qxg2
- 2.Re3#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Qxd3
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Rxd3
- 2.Sxd2#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Rxf5
- 2.Re3#
- 2.R3d4#
- 2.R5d4#
- 1...Bxg2
- 2.Sg3#
- 2.Re3#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Qe3
- 2.Rxe3#
- 2.R3d4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 1...Sc5
- 2.Sxd2#
- 2.Re3#
- 2.R3d4#
- 2.Rxc5#
- 1...b5
- 2.Re3#
- 2.R3d4#
- 2.Rxb5#
- 2.Rc5#
- 1...Rxc2!
- threat
- 1.Qxa4?
- threat
- 2.Qe8#
- 1...Rxc4+
- 2.Qxc4#
- 1...Bxf5+
- 2.Rd7#
- 1...Rxf5
- 2.R5d4#
- 1...Qf4
- 2.R3d4#
- 1...Qg5
- 2.R3d4#
- 1...Sf3
- 2.gxf3#
- 1...Sg4
- 2.Sg3#
- 1...b5!
- threat
- 1.g4?
- threat
- 2.Sg3#
- 2.R5d4#
- 2.Rd7#
- 2.Rd8#
- 1...Rxc4+
- 2.Qxc4#
- 1...Qxd3
- 2.Rd4#
- 1...Rxd3
- 2.Rd4#
- 1...Rxf5
- 2.R5d4#
- 1...Sxg4
- 2.Sg3#
- 1...Qe3
- 2.R5d4#
- 2.Rd7#
- 2.Rd8#
- 1...Qe1
- 2.R5d4#
- 2.Rd7#
- 2.Rd8#
- 1...Qf4
- 2.R5d4#
- 2.Rd6#
- 2.Rd7#
- 2.Rd8#
- 1...Qf2
- 2.R5d4#
- 2.Rd7#
- 2.Rd8#
- 1...Qg2
- 2.R5d4#
- 2.Rd7#
- 2.Rd8#
- 1...Sf1
- 2.R5d4#
- 2.Rd7#
- 2.Rd8#
- 1...Sc5
- 2.Sxd2#
- 2.Sg3#
- 2.R5d4#
- 1...Bxg4!
- threat
- 1.Rxd2?
- Keys
- 1.Qa3!
- threat
- 2.Qe7#
- 1...Rxc4+
- 2.Rc5#
- 1...Bxf5+
- 2.Rd7#
- 1...Rxa3
- 2.Sxd2#
- 1...Rxf5
- 2.R5d4#
- 1...Qf4
- 2.R3d4#
- 1...Qg5
- 2.R3d4#
- 1...Sf3
- 2.gxf3#
- 1...Sg4
- 2.Sg3#
- 1...Sc5
- 2.Sxd2#
- threat
- 1.Qa3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- Q(b);N_GUARD::R1(C)
- R(d);N_PINS(D),P_PINS(F)::S(D),XQ(b)
- R(d);CHECK,OGATE,P_PINS(F),XS(D)::QAR2(A),XR(d)
- R(h);SBLOCK,XS(F)::B(G)+R(E),DCHECK
- B(e);XP(B)::S(F)
- B(e);CHECK,SBLOCK,XS(F)::B(G)+R(E)
- S(c);OGATE::P(B),XS(c)
- S(c);::S(F)
- S(f);N_PINS(D),P_PINS(F)::S(D),XQ(b)
- Tries
- Try
- R(C);XQ(b)
- Threat
- DUALS(4)
- Vars
- B(e);CHECK,SBLOCK,XS(F)::B(G)+R(E)
- Refutation
- R(d);N_PINS(D),P_PINS(F)
- Try
- R(C);CHECK
- Vars
- R(d);N_PINS(D),P_PINS(F),XR(C)::S(D),XQ(b)
- Refutation
- Q(b);XR(C)
- Try
- Q(A);XP(a)
- Threat
- DUALS(5)
- Vars
- B(e);CHECK,SBLOCK,XS(F)::B(G)+R(E)
- Q(b);XQ(A)::R1(C)
- Refutation
- R(d);XQ(A)
- Try
- Q(A);XS(f)
- Threat
- QAR(A)
- Vars
- R(d);CHECK,OGATE,P_PINS(F),P_SPINR(d),XS(D)::QAR2(A),XR(d)
- B(e);CHECK,SBLOCK,XS(F)::B(G)+R(E)
- R(h);SBLOCK,XS(F)::B(G)+R(E),DCHECK
- Q(b);N_GUARD::R1(C)
- S(c);OGATE::P(B),XS(c)
- S(c);::S(F)
- Refutation
- P(i);
- Try
- P(B);
- Threat
- DUALS(4)
- Vars
- R(d);CHECK,OGATE,XS(D)::QAR2(A),XR(d)
- Q(b);XR(C)::B(G)+R(E),DCHECK
- R(d);N_PINS(D),XR(C)::B(G)+R(E),DCHECK
- R(h);XS(F)::B(G)+R(E),DCHECK
- S(c);XP(B)::S(F)
- Refutation
- B(e);XP(B)
- Try
- Actual
- Q(A);
- Threat
- QAR(A)
- Vars
- R(d);CHECK,P_PINS(F),XS(D)::B(G)+R(E)
- B(e);CHECK,SBLOCK,XS(F)::B(G)+R(E)
- R(d);N_PINS(D),P_PINS(F),XQ(A)::S(D),XQ(b)
- R(h);SBLOCK,XS(F)::B(G)+R(E),DCHECK
- Q(b);N_GUARD::R1(C)
- S(c);OGATE::P(B),XS(c)
- S(c);::S(F)
- S(f);N_PINS(D),P_PINS(F)::S(D),XQ(b)
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