MESON Chess Problem Database

Problem Display
PID: 78957 (B4B2/rr2p2K/1p4p1/nN1k1nR1/3N1P2/1bQP4/8/8 w - - 0 1)

Schor, Laszlo

Bristol Times and Mirror, 1930

(First published on Sat Jul 19 1930)

B4B2/rr2p2K/1p4p1/nN1k1nR1/3N1P2/1bQP4/8/8

#2

9 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Qxc6#
    • 1...e5+
      • 2.Sc7#
    • 1...e6+
      • 2.Sc7#
  • Tries
    • 1.Bxb7+?
      • 1...Sc6
        • 2.Bxc6#
        • 2.Qxc6#
      • 1...Sxb7
        • 2.Qc6#
      • 1...Rxb7!
    • 1.Bxe7?
      • threat
        • 2.Sc7#
      • 1...Sc6
        • 2.Qxb3#
        • 2.Qxc6#
      • 1...Rxa8!
    • 1.Rxf5+?
      • 1...e5+
        • 2.Sc7#
      • 1...gxf5!
  • Keys
    • 1.Qc7!
      • threat
        • 2.Qe5#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sc4
        • 2.Qc6#
      • 1...e5
        • 2.Qf7#
      • 1...e6
        • 2.Qd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • S(b);N_GUARD,N_SPINR(h)::QAB1(A),XS(b)
    • P(i);CHECK,N_SPINS(d)::S(E)
    • P(i);CHECK::S(E)
  • Tries
    • Try
      • B(H);CHECK,XR(h)
      • Vars
        • S(b);N_GUARD,XB(H)::QAB1(A)
      • Refutation
        • R(g);XB(H)
    • Try
      • B(I);P_SPINB(I),XP(i)
      • Threat
        • S(E)
      • Refutation
        • R(g);N_SPINR(h),XB(H)
    • Try
      • R(F);CHECK,XS(d)
      • Vars
        • P(i);CHECK,P_SPINP(i)::S(E)
      • Refutation
        • P(f);XR(F)
  • Actual
    • Q(A);
    • Threat
      • QAR1(A)
    • Vars
      • S(b);N_GUARD,N_SPINR(h)::QAB1(A),XS(b)
      • S(b);N_GUARD::QAB1(A)
      • P(i);N_SPINS(d),OGATE,P_PINQ(A)::QAB(A)
      • P(i);P_PINQ(A)::QAR2(A)
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