MESON Chess Problem Database
Problem Display
PID: 225110 (1qn2Q1K/5bpB/1pp5/2rNkPP1/7R/8/8/2NR4 w - - 0 1)
Robert, Philippe
diagrammes, 1975
#2
9 + 8
SOLUTION
- SOUND
- Sets
- 1...Rxd5
- 2.Re1#
- 1...Bxd5
- 2.Sd3#
- 1...Sa7
- 2.Qxb8#
- 1...Se7
- 2.Qxb8#
- 1...cxd5
- 2.Sd3#
- 2.Re1#
- 1...Rxd5
- Tries
- 1.Sc3?
- threat
- 2.Sd3#
- 2.Re1#
- 2.Re4#
- 2.Qxg7#
- 1...Rxc3
- 2.Qxg7#
- 1...Qd6
- 2.Re1#
- 2.Re4#
- 1...Rc4
- 2.Sd3#
- 2.Qxg7#
- 1...Rd5
- 2.Re1#
- 2.Re4#
- 1...Bc4
- 2.Re4#
- 2.Qxg7#
- 1...Bd5
- 2.Sd3#
- 1...Bh5
- 2.Sd3#
- 2.Re4#
- 2.Qxg7#
- 1...Bg6
- 2.Sd3#
- 2.Re1#
- 2.Re4#
- 1...Sd6
- 2.Sd3#
- 1...Sa7
- 2.Sd3#
- 2.Re1#
- 2.Re4#
- 2.Qxb8#
- 1...Se7
- 2.Re4#
- 2.Qxb8#
- 1...g6!
- threat
- 1.Se3?
- threat
- 2.Sd3#
- 2.Qxg7#
- 1...Rxc1
- 2.Qxg7#
- 1...Rc3
- 2.Qxg7#
- 1...Rd5
- 2.Sc4#
- 1...Bc4
- 2.Qxg7#
- 1...Bd5
- 2.Sd3#
- 1...Sd6
- 2.Sd3#
- 1...Sa7
- 2.Sd3#
- 2.Qxb8#
- 1...Se7
- 2.Qxb8#
- 1...g6
- 2.Sd3#
- 2.Qg7#
- 1...Qd6!
- threat
- 1.Sb4?
- threat
- 2.Scd3#
- 2.Re1#
- 2.Qxg7#
- 1...Rxc1
- 2.Qxg7#
- 1...Qd6
- 2.Re1#
- 1...Rc2
- 2.Scd3#
- 2.Qxg7#
- 1...Rc3
- 2.Qxg7#
- 1...Rc4
- 2.Scd3#
- 2.Qxg7#
- 1...Rd5
- 2.Sxc6#
- 2.Re1#
- 1...Bc4
- 2.Qxg7#
- 1...Bd5
- 2.Scd3#
- 2.Sbd3#
- 1...Bh5
- 2.Scd3#
- 2.Qxg7#
- 1...Bg6
- 2.Scd3#
- 2.Re1#
- 1...Sd6
- 2.Scd3#
- 1...Sa7
- 2.Scd3#
- 2.Re1#
- 2.Qxb8#
- 1...Se7
- 2.Qxb8#
- 1...g6!
- threat
- 1.Sxb6?
- threat
- 2.Sd3#
- 2.Sd7#
- 2.Re1#
- 2.Qxg7#
- 1...Qxb6
- 2.Qxg7#
- 1...Rxc1
- 2.Sd7#
- 2.Qxg7#
- 1...Sxb6
- 2.Qxb8#
- 1...Qd6
- 2.Re1#
- 1...Qa7
- 2.Sd3#
- 2.Re1#
- 2.Qxg7#
- 1...Qc7
- 2.Sd3#
- 2.Re1#
- 2.Qxg7#
- 1...Qb7
- 2.Sd3#
- 2.Re1#
- 2.Qxg7#
- 1...Rc2
- 2.Sd3#
- 2.Sd7#
- 2.Qxg7#
- 1...Rc3
- 2.Sd7#
- 2.Qxg7#
- 1...Rc4
- 2.Sd3#
- 2.Sd7#
- 2.Qxg7#
- 1...Rd5
- 2.Sc4#
- 2.Re1#
- 1...Bc4
- 2.Sd7#
- 2.Qxg7#
- 1...Bd5
- 2.Sd3#
- 2.Sd7#
- 1...Bh5
- 2.Sd3#
- 2.Sd7#
- 2.Qxc5#
- 2.Qxg7#
- 1...Be6
- 2.Sd3#
- 2.Re1#
- 2.Qxg7#
- 1...Bg6
- 2.Sd3#
- 2.Sd7#
- 2.Re1#
- 2.Qxc5#
- 1...Be8
- 2.Sd3#
- 2.Re1#
- 2.Qxc5#
- 2.Qxg7#
- 1...Sd6
- 2.Sd3#
- 2.Sd7#
- 1...Sa7
- 2.Sd3#
- 2.Sd7#
- 2.Re1#
- 2.Qxb8#
- 1...Se7
- 2.Sd7#
- 2.Qxb8#
- 1...g6!
- threat
- 1.Rdd4?
- threat
- 2.Sd3#
- 2.Rhe4#
- 1...Rxc1
- 2.Rhe4#
- 1...Bxd5
- 2.Sd3#
- 1...cxd5
- 2.Sd3#
- 1...Se7
- 2.Qxb8#
- 1...Rc3
- 2.Rhe4#
- 1...Sd6
- 2.Sd3#
- 1...g6!
- threat
- 1.Qe7+?
- 1...Be6
- 2.Qxe6#
- 1...Sxe7+!
- 1...Be6
- 1.Sc3?
- Keys
- 1.Se7!
- threat
- 2.Qxg7#
- 1...Sxe7
- 2.Qxb8#
- 1...Rd5
- 2.Sxc6#
- 1...Bd5
- 2.Sg6#
- 1...Qd6
- 2.Re1#
- 1...Sd6
- 2.Sd3#
- 1...Sa7
- 2.Qxb8#
- 1...g6
- 2.Qg7#
- threat
- 1.Se7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- R(a);SBLOCK,XS(D)::R(B)
- B(e);SBLOCK,XS(D)::S(A)
- S(h);OGATE,P_PINQ(H)::QAB(H),XQ(g)
- Tries
- Try
- S(D);
- Threat
- DUALS(4)
- Vars
- R(a);XS(D)::QAB(H),XP(f)
- B(e);::S(A)
- S(h);P_PINQ(H)::S(A)
- Refutation
- P(f);
- Try
- S(D);
- Threat
- DUALS(2)
- Vars
- R(a);XS(A)::QAB(H),XP(f)
- R(a);::QAB(H),XP(f)
- R(a);N_GUARD,S_CUTB(e)::S(D)
- B(e);::QAB(H),XP(f)
- B(e);::S(A)
- S(h);P_PINQ(H)::S(A)
- S(h);OGATE,P_PINQ(H)::QAB(H),XQ(g)
- Refutation
- Q(g);
- Try
- S(D);
- Threat
- DUALS(3)
- Vars
- R(a);XS(A)::QAB(H),XP(f)
- Q(g);::R(B)
- R(a);::QAB(H),XP(f)
- B(e);::QAB(H),XP(f)
- S(h);P_PINQ(H)::S(A)
- S(h);OGATE,P_PINQ(H)::QAB(H),XQ(g)
- Refutation
- P(f);
- Try
- S(D);XP(c)
- Threat
- DUALS(4)
- Vars
- Q(g);XS(D)::QAB(H),XP(f)
- S(h);OGATE,P_PINQ(H),XS(D)::QAB(H),XQ(g)
- Q(g);::R(B)
- Refutation
- P(f);
- Try
- R(B);
- Threat
- DUALS(2)
- Vars
- R(a);XS(A)::R1(C)
- B(e);XS(D)::S(A)
- P(d);XS(D)::S(A)
- S(h);OGATE,P_PINQ(H)::QAB(H),XQ(g)
- R(a);::R1(C)
- S(h);P_PINQ(H)::S(A)
- Refutation
- P(f);
- Try
- Q(H);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAR1(H),XB(e)
- Refutation
- S(h);CHECK,XQ(H)
- Try
- Actual
- S(D);
- Threat
- QAB(H),XP(f)
- Vars
- S(h);OGATE,P_PINQ(H),XS(D)::QAB(H),XQ(g)
- R(a);N_GUARD::S(D),XP(d)
- B(e);N_GUARD::S(D)
- Q(g);SBLOCK::R(B)
- S(h);P_PINQ(H),SBLOCK::S(A)
- S(h);OGATE,P_PINQ(H)::QAB(H),XQ(g)
- P(f);::QAB(H)
Developed and maintained by Brian Stephenson.
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