MESON Chess Problem Database

Problem Display
PID: 64306 (3K4/PQ6/2r1p3/RN2p1P1/2pBknpP/3Nn3/4P3/1B1r1R1b w - - 0 1)

Cristoffanini, Guido

2/3 Prize, Weenink MT, 1932

3K4/PQ6/2r1p3/RN2p1P1/2pBknpP/3Nn3/4P3/1B1r1R1b

#2

12 + 10

81 Chess 1946

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Sb4#
    • 1...Kf5
      • 2.Qh7#
    • 1...Sed5
      • 2.Sf2#
      • 2.Sc5#
    • 1...Sfd5
      • 2.Sc5#
    • 1...exd4
      • 2.Sd6#
  • Tries
    • 1.Sc3+?
      • 1...Kf5
        • 2.Qf7#
        • 2.Qh7#
      • 1...Kxd4!
    • 1.Rxf4+?
      • 1...Kd5
        • 2.Sb4#
      • 1...exf4!
    • 1.Qxc6+?
      • 1...Sed5
        • 2.Sf2#
        • 2.Sc5#
      • 1...Sfd5
        • 2.Sc5#
      • 1...Kf5!
  • Keys
    • 1.Bb6!
      • threat
        • 2.Sd6#
      • 1...Kd5
        • 2.Sb4#
      • 1...Kf5
        • 2.Qh7#
      • 1...Sed5
        • 2.Sf2#
      • 1...Sf5
        • 2.Sc3#
      • 1...Sfd5
        • 2.Sc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(e);S_FLIGHT::S(D)
    • K(e);N_SPINR(i),P_SPINS(f),S_FLIGHT::QAB(K)
    • S(f);N_SPINR(i),SBLOCK::B(A)+S(D),DCHECK
    • P(h);SBLOCK,XB(E)::S(H)
  • Tries
    • Try
      • S(H);CHECK
      • Refutation
        • K(e);N_SPINR(i),P-FLIGHT,XB(E)
    • Try
      • R(B);CHECK,XS(f)
      • Vars
        • K(e);S_FLIGHT::S(D)
      • Refutation
        • P(h);XR(B)
    • Try
      • Q(K);CHECK,XR(i)
      • Vars
        • S(f);P_SPINS(f)::B(A)+S(D),DCHECK
      • Refutation
        • K(e);P_SPINS(f),S_FLIGHT
  • Actual
    • B(E);P_SPINS(D)
    • Threat
      • S(H)
    • Vars
      • K(e);N_PINS(D),S_FLIGHT::S(D)
      • K(e);N_SPINR(i),P_SPINS(f),S_FLIGHT::QAB(K)
      • S(c);N_PINS(D),N_SPINR(i),SBLOCK::B(A)+S(D),DCHECK
      • S(c);SBLOCK::S(H)
      • S(f);N_PINS(D),N_SPINR(i),SBLOCK::B(A)+S(D),DCHECK
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