MESON Chess Problem Database
Problem Display
PID: 71049 (1bK1R3/2N5/ppk5/1qn1P3/1Pr1R3/1N6/2Q5/8 w - - 0 1)
Coello Alonso, Jose Antonio
Petite, Efren
Scacchi e Scienze Applicate, 1985
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Rxc2
- 2.Sd4#
- 1...Rc3
- 2.Sd4#
- 1...Rxb4
- 2.Re6#
- 1...Rd4
- 2.Sxd4#
- 1...Rxe4
- 2.Re6#
- 1...Sxb3
- 2.Re6#
- 1...Sd3
- 2.Sd4#
- 2.Re6#
- 1...Sa4
- 2.Sd4#
- 2.Re6#
- 1...Sxe4
- 2.Sd4#
- 1...Se6
- 2.Rxe6#
- 1...Sb7
- 2.Sd4#
- 1...Sd7
- 2.Sd4#
- 2.Re6#
- 1...Rxc2
- Tries
- 1.Rxc4?
- threat
- 2.Sd4#
- 2.Re6#
- 2.Qe4#
- 2.Qg6#
- 2.Qg2#
- 1...Bxc7
- 2.Qe4#
- 2.Qg2#
- 1...Qxc4!
- threat
- 1.Rd8?
- threat
- 2.Rd6#
- 1...Sxe4
- 2.Sd4#
- 1...Rd4
- 2.Sxd4#
- 1...Sb7
- 2.Sd4#
- 1...Sd7
- 2.Sd4#
- 1...Bxc7!
- threat
- 1.Qd1?
- threat
- 2.Qd5#
- 2.Qd6#
- 1...Sxb3
- 2.Re6#
- 2.Qd6#
- 2.Qd7#
- 1...Sxe4
- 2.Qd7#
- 1...Rd4
- 2.Sxd4#
- 1...Sd3
- 2.Re6#
- 1...Sa4
- 2.Re6#
- 2.Qd6#
- 2.Qd7#
- 1...Se6
- 2.Rxe6#
- 2.Qd6#
- 2.Qd7#
- 1...Sb7
- 2.Qd7#
- 1...Sd7
- 2.Re6#
- 2.Qd6#
- 2.Qxd7#
- 1...Bxc7!
- threat
- 1.Qd3?
- threat
- 2.Qd5#
- 2.Qd6#
- 1...Sxb3
- 2.Re6#
- 2.Qd6#
- 2.Qd7#
- 1...Sxd3
- 2.Re6#
- 1...Sxe4
- 2.Qd7#
- 1...Rd4
- 2.Sxd4#
- 1...Sa4
- 2.Re6#
- 2.Qd6#
- 2.Qd7#
- 1...Se6
- 2.Rxe6#
- 2.Qd6#
- 2.Qd7#
- 1...Sb7
- 2.Qd7#
- 1...Sd7
- 2.Re6#
- 2.Qd6#
- 2.Qxd7#
- 1...Bxc7!
- threat
- 1.Qd2?
- threat
- 2.Qd5#
- 2.Qd6#
- 1...Sxb3
- 2.Re6#
- 2.Qh6#
- 2.Qd6#
- 2.Qd7#
- 1...Sxe4
- 2.Qd7#
- 1...Rd4
- 2.Sxd4#
- 1...Sd3
- 2.Re6#
- 2.Qh6#
- 1...Sa4
- 2.Re6#
- 2.Qh6#
- 2.Qd6#
- 2.Qd7#
- 1...Se6
- 2.Rxe6#
- 2.Qd6#
- 2.Qd7#
- 1...Sb7
- 2.Qd7#
- 1...Sd7
- 2.Re6#
- 2.Qd6#
- 2.Qxd7#
- 1...Bxc7!
- threat
- 1.Qxc4?
- threat
- 2.Sd4#
- 2.Re6#
- 2.Qd5#
- 1...Bxc7
- 2.Sd4#
- 1...Qxc4!
- threat
- 1.Rxc4?
- Keys
- 1.Qg2!
- threat
- 2.Rxc4#
- 1...Rxb4
- 2.Rc4#
- 1...Rxe4
- 2.Sd4#
- 1...Sxe4
- 2.Re6#
- 1...Rc1
- 2.Sd4#
- 2.Rc4#
- 1...Rc2
- 2.Sd4#
- 1...Rc3
- 2.Sd4#
- 1...Rd4
- 2.Sxd4#
- threat
- 1.Qg2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- R(a);N_GUARD,XQ(A)::S(B)
- R(a);N_GUARD::S(B)
- R(a);P_SPINS(c),XP(C)::R(H)
- R(a);N_GUARD,P_SPINS(c)::S(B),XR(a)
- R(a);P_SPINS(c),XR(D)::R(H)
- S(c);N_GUARD,P_SPINR(a),XS(B)::R(H)
- S(c);P_SPINR(a),XR(D)::S(B)
- S(c);N_GUARD,P_SPINR(a)::R(H),XS(c)
- S(c);P_SPINR(a)::S(B)
- Tries
- Try
- R(D);P_PINS(c),XR(a)
- Threat
- DUALS(5)
- Refutation
- Q(b);N_SPINS(c),XR(D)
- Try
- R(H);
- Threat
- R1(H)
- Vars
- S(c);P_SPINR(a),XR(D)::S(B)
- R(a);N_GUARD,P_SPINS(c)::S(B),XR(a)
- S(c);P_SPINR(a)::S(B)
- Refutation
- B(g);XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,XR(D)::QAB1(A)
- R(a);N_GUARD::S(B),XR(a)
- S(c);N_GUARD::R(H)
- S(c);N_GUARD::QAB1(A)
- Refutation
- B(g);XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,XQ(A)::R(H)
- S(c);N_GUARD,XR(D)::QAB1(A)
- R(a);N_GUARD::S(B),XR(a)
- S(c);N_GUARD::QAB1(A)
- Refutation
- B(g);XS(F)
- Try
- Q(A);
- Threat
- DUALS(2)
- Vars
- S(c);N_GUARD,XR(D)::QAB1(A)
- R(a);N_GUARD::S(B),XR(a)
- S(c);N_GUARD::QAB1(A)
- Refutation
- B(g);XS(F)
- Try
- Q(A);P_PINS(c),XR(a)
- Threat
- DUALS(3)
- Vars
- B(g);XS(F)::S(B)
- Refutation
- Q(b);N_SPINS(c),XQ(A)
- Try
- Actual
- Q(A);
- Threat
- QAB(A)+R(D),XR(a)
- Vars
- R(a);XP(C)::QAB(A)+R(D)
- R(a);N_GUARD,P_SPINR(a),XR(D)::S(B)
- S(c);N_GUARD,P_SPINS(c),XR(D)::R(H)
- R(a);N_GUARD::S(B)
- R(a);N_GUARD::S(B),XR(a)
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