MESON Chess Problem Database

Problem Display
PID: 272860 (1Q6/2Nbr1n1/6P1/2PpkpR1/6P1/2N1p3/BB4P1/1K3R2 w - - 0 1)

Warren, CN

The Problemist, 1930

1Q6/2Nbr1n1/6P1/2PpkpR1/6P1/2N1p3/BB4P1/1K3R2

#2

12 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Kf6
      • 2.Se4#
    • 1...d4
      • 2.Se8#
  • Tries
    • 1.S7b5+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kf6!
    • 1.S7xd5+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kd4!
    • 1.Sa6+?
      • 1...Kd4
        • 2.Rd1#
      • 1...Ke6
        • 2.Qd6#
      • 1...Kf6!
    • 1.Se6+?
      • 1...Kxe6
        • 2.Qd6#
      • 1...Kf6!
    • 1.Se8+?
      • 1...Ke6
        • 2.Bxd5#
        • 2.Qd6#
      • 1...Kd4!
    • 1.Qb4?
      • threat
        • 2.S3xd5#
      • 1...Kf6
        • 2.Se4#
      • 1...Se6
        • 2.Rfxf5#
        • 2.Rgxf5#
      • 1...d4!
  • Keys
    • 1.Rf4!
      • threat
        • 2.S3xd5#
      • 1...Kxf4
        • 2.Se6#
      • 1...Kf6
        • 2.Se4#
      • 1...Se6
        • 2.Rgxf5#
      • 1...d4
        • 2.Se8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(c);N_GUARD,S_FLIGHT::B(D)+S(F),DCHECK
    • P(b);SBLOCK::QAB(L)+S(K)
  • Tries
    • Try
      • S(K);CHECK
      • Vars
        • K(c);N_SPINP(d),P-FLIGHT,P_SPINP(b)::QAR1(L)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(K);CHECK,XP(b)
      • Vars
        • K(c);N_GUARD,N_SPINP(d),P-FLIGHT::QAR1(L)
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
    • Try
      • S(K);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(d),S_FLIGHT::R(B)
        • K(c);N_GUARD,N_SPINP(d),P-FLIGHT,P_SPINP(b)::QAR1(L)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(K);CHECK
      • Vars
        • K(c);N_GUARD,N_SPINP(d),P-FLIGHT,P_SPINP(b),XS(K)::QAR1(L)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(K);CHECK
      • Refutation
        • K(c);N_SPINP(d),S_FLIGHT
    • Try
      • Q(L);
      • Threat
        • B(D)+S(F),XP(b)
      • Vars
        • K(c);S_FLIGHT::B(D)+S(F),DCHECK
      • Refutation
        • P(b);
  • Actual
    • R(B);
    • Threat
      • B(D)+S(F),XP(b)
    • Vars
      • K(c);N_GUARD,N_SPINP(d),S_FLIGHT,XR(B)::QAB(L)+S(K),DCHECK
      • K(c);N_GUARD,S_FLIGHT::B(D)+S(F),DCHECK
      • S(g);N_GUARD,S_CUTB(e)::R1(I),XP(d)
      • P(b);::QAB(L)+S(K)
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