MESON Chess Problem Database
Problem Display
PID: 228891 (8/1b2p3/Pp4P1/3p3R/nK1k1N2/3Br3/2RQP3/8 w - - 0 1)
Cristoffanini, Guido
L'Echiquier, 1926
#2
9 + 7
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Rxe2
- 2.Sxe2#
- 1...Rxd3
- 2.Qxd3#
- 1...Rf3
- 2.Se6#
- 1...Rg3
- 2.Se6#
- 1...Rh3
- 2.Se6#
- 1...Re4
- 2.Bc4#
- 2.Bb5#
- 1...Re5
- 2.Bf5#
- 1...Re6
- 2.Sxe6#
- 1...Bxa6
- 2.Rxd5#
- 1...Bc8
- 2.Rxd5#
- 1...Sb2
- 2.Qc3#
- 1...Sc3
- 2.Qxc3#
- 1...Sc5
- 2.Qc3#
- 1...e5
- 2.Se6#
- 1...Rxe2
- Tries
- 1.Kb3?
- threat
- 2.Qb4#
- 1...Rxd3+
- 2.Qxd3#
- 1...Rxe2
- 2.Sxe2#
- 1...Bxa6
- 2.Rxd5#
- 1...Sc3
- 2.Qxc3#
- 1...Rf3
- 2.Se6#
- 1...Rg3
- 2.Se6#
- 1...Rh3
- 2.Se6#
- 1...Re4
- 2.Bb5#
- 1...Re5
- 2.Bf5#
- 1...Re6
- 2.Sxe6#
- 1...Sb2
- 2.Qc3#
- 1...Sc5+!
- threat
- 1.Bc4+?
- 1...Rd3
- 2.Qxd3#
- 1...Ke4!
- 1...Rd3
- 1.Be4+?
- 1...Rd3
- 2.Qxd3#
- 1...Kxe4!
- 1...Rd3
- 1.Bb5+?
- 1...Rd3
- 2.Qxd3#
- 1...Ke4!
- 1...Rd3
- 1.axb7?
- threat
- 2.Rxd5#
- 1...Rxd3
- 2.Qxd3#
- 1...Re5
- 2.Bf5#
- 1...Sc3
- 2.Qxc3#
- 1...e5
- 2.Se6#
- 1...e6!
- threat
- 1.Kb3?
- Keys
- 1.Ka3!
- threat
- 2.Qb4#
- 1...Rxd3+
- 2.Qxd3#
- 1...Rxe2
- 2.Sxe2#
- 1...Bxa6
- 2.Rxd5#
- 1...Sc3
- 2.Qxc3#
- 1...Rf3
- 2.Se6#
- 1...Rg3
- 2.Se6#
- 1...Rh3
- 2.Se6#
- 1...Re4
- 2.Bb5#
- 1...Re5
- 2.Bf5#
- 1...Re6
- 2.Sxe6#
- 1...Sb2
- 2.Qc3#
- threat
- 1.Ka3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(a);XP(C)::S(F),XR(a)
- R(a);OGATE,P_SPINR(a),XB(D)::QAR1(B),XR(a)
- R(a);N_GUARD::S(F)
- R(a);N_GUARD,SBLOCK::QAR(B)+B(D)
- R(a);N_GUARD::S(F),XR(a)
- B(f);N_GUARD,XP(H)::R1(G),XP(d)
- B(f);N_GUARD::R1(G),XP(d)
- S(b);N_GUARD::QAB1(B)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(g);S_CUTR(a)::S(F)
- Tries
- Try
- K(E);P-FLIGHT,P_SPINB(D)
- Threat
- QAR2(B)
- Vars
- R(a);CHECK,P_SPINR(a),XB(D)::QAR1(B),XR(a)
- R(a);N_PINB(D),XP(C)::S(F),XR(a)
- B(f);N_GUARD,XP(H)::R1(G),XP(d)
- S(b);N_GUARD,N_PINB(D)::QAB1(B),XS(b)
- R(a);N_GUARD::S(F)
- R(a);N_PINB(D),SBLOCK::QAR(B)+B(D)
- R(a);N_GUARD,N_PINB(D)::S(F),XR(a)
- S(b);N_GUARD::QAB1(B)
- Refutation
- S(b);CHECK
- Try
- B(D);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAR1(B),XR(a)
- Refutation
- K(c);P-FLIGHT
- Try
- B(D);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAR1(B),XR(a)
- Refutation
- K(c);P-FLIGHT,XB(D)
- Try
- B(D);CHECK
- Vars
- R(a);N_GUARD,P_SPINR(a)::QAR1(B),XR(a)
- Refutation
- K(c);P-FLIGHT
- Try
- P(H);XB(f)
- Threat
- R1(G),XP(d)
- Vars
- R(a);OGATE,P_SPINR(a),XB(D)::QAR1(B),XR(a)
- R(a);N_GUARD,SBLOCK::QAR(B)+B(D)
- S(b);N_GUARD::QAB1(B),XS(b)
- P(g);S_CUTR(a)::S(F)
- Refutation
- P(g);
- Try
- Actual
- K(E);P_SPINB(D),S_FLIGHT
- Threat
- QAR2(B)
- Vars
- R(a);CHECK,P_SPINR(a),XB(D)::QAR1(B),XR(a)
- R(a);N_PINB(D),XP(C)::S(F),XR(a)
- B(f);N_GUARD,XP(H)::R1(G),XP(d)
- S(b);N_GUARD,N_PINB(D)::QAB1(B),XS(b)
- R(a);N_GUARD::S(F)
- R(a);N_PINB(D),SBLOCK::QAR(B)+B(D)
- R(a);N_GUARD,N_PINB(D)::S(F),XR(a)
- S(b);N_GUARD::QAB1(B)
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