MESON Chess Problem Database

Problem Display
PID: 239808 (2Q4b/p2nNR2/1p1k2p1/2p1N2b/qpP1P1n1/1p1K3B/3R1p1B/5r2 w - - 0 1)

Cristoffanini, Guido

Shakhmaty v SSSR, 1932

2Q4b/p2nNR2/1p1k2p1/2p1N2b/qpP1P1n1/1p1K3B/3R1p1B/5r2

#2

10 + 14

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qxc6#
    • 1...Qa1
      • 2.Qxd7#
      • 2.Qc6#
    • 1...Qa2
      • 2.Qxd7#
      • 2.Qc6#
    • 1...Qa3
      • 2.Qxd7#
      • 2.Qc6#
    • 1...Qa5
      • 2.Qxd7#
      • 2.Qc6#
    • 1...Qa6
      • 2.Qxd7#
      • 2.Qc6#
    • 1...Se3
      • 2.Kxe3#
    • 1...Sgxe5+
      • 2.Ke3#
    • 1...Sgf6
      • 2.Sxd7#
    • 1...Sh6
      • 2.Ke3#
    • 1...Sdxe5+
      • 2.Ke2#
    • 1...Sdf6
      • 2.Sxg4#
    • 1...Sb8
      • 2.Ke2#
    • 1...Sf8
      • 2.Ke2#
    • 1...b5
      • 2.Qxd7#
      • 2.Qc6#
  • Tries
    • 1.S5c6+?
      • 1...Ke6
        • 2.Sd8#
      • 1...Sxh2
        • 2.Qxd7#
      • 1...Sge5+
        • 2.Ke3#
      • 1...Sde5+
        • 2.Ke2#
      • 1...Be5!
    • 1.Sf5+?
      • 1...Ke6
        • 2.Qe8#
      • 1...gxf5!
  • Keys
    • 1.S7c6!
      • threat
        • 2.Qxd7#
      • 1...Sgxe5+
        • 2.Ke3#
      • 1...Sdxe5+
        • 2.Ke2#
      • 1...Ke6
        • 2.Qxd7#
      • 1...Qxc6
        • 2.Qxc6#
      • 1...Sgf6
        • 2.Sxd7#
      • 1...Sdf6
        • 2.Sxg4#
      • 1...Sb8
        • 2.Ke2#
      • 1...Sf8
        • 2.Ke2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • Q(d);N_GUARD::QAR1(J),XQ(d)
    • S(f);::R(A)+K(C),XS(f)
    • S(f);CHECK,P_SPINS(f),XS(G)::R(A)+K(C)
    • S(f);N_GUARD,S_CUTB(n)::B(B)+S(G),XS(m)
    • S(f);::R(A)+K(C)
    • S(m);CHECK,P_SPINS(m),XS(G)::R(A)+K(C)
    • S(m);N_GUARD,S_CUTB(n)::B(B)+S(G),XS(f)
    • S(m);::R(A)+K(C)
  • Tries
    • Try
      • S(G);CHECK
      • Vars
        • K(j);P-FLIGHT,P_SPINS(f)::S(G)
        • S(f);XB(B)::QAR1(J),XS(m)
        • S(f);CHECK,P_SPINS(f)::R(A)+K(C)
        • S(m);CHECK,P_SPINS(m)::R(A)+K(C)
      • Refutation
        • B(n);P_SPINB(n)
    • Try
      • S(H);CHECK
      • Vars
        • K(j);P-FLIGHT,P_SPINS(m)::QAR2(J)
      • Refutation
        • P(k);XS(H)
  • Actual
    • S(H);
    • Threat
      • QAR1(J),XS(m)
    • Vars
      • S(f);CHECK,P_SPINS(f),XS(G)::R(A)+K(C)
      • S(m);CHECK,P_SPINS(m),XS(G)::R(A)+K(C)
      • K(j);P-FLIGHT,P_SPINS(f)::QAB1(J),XS(m)
      • Q(d);OGATE,XS(H)::QAR1(J),XQ(d)
      • S(f);N_GUARD,S_CUTB(n)::B(B)+S(G),XS(m)
      • S(m);N_GUARD,S_CUTB(n)::B(B)+S(G),XS(f)
      • S(m);::R(A)+K(C)
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