MESON Chess Problem Database

Problem Display
PID: 158117 (R1B5/N7/2pr4/k3n1Q1/bb1B4/8/3N4/R3K3 w Q - 0 1)

Apro, Laszlo

Schackvarlden, 1933

R1B5/N7/2pr4/k3n1Q1/bb1B4/8/3N4/R3K3

#2

8 + 6

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Re6
      • 2.Qd8#
    • 1...Rg6
      • 2.Qd8#
    • 1...Rh6
      • 2.Qd8#
    • 1...Rd8
      • 2.Qxd8#
    • 1...Bxd2+
      • 2.Qxd2#
  • Tries
    • 1.Qxe5+?
      • 1...Rd5
        • 2.Qc7#
      • 1...Bc5
        • 2.Qxc5#
      • 1...c5!
  • Keys
    • 1.Rb8!
      • threat
        • 2.Bb6#
      • 1...Bxd2+
        • 2.Qxd2#
      • 1...Rxd4
        • 2.Sxc6#
      • 1...Ba3
        • 2.Sc4#
      • 1...Bc3
        • 2.Bxc3#
      • 1...Bc5
        • 2.Sb3#
      • 1...c5
        • 2.Rb5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • R(f);N_GUARD::QAB(E)
    • R(f);N_GUARD::QAB(E),XR(f)
    • B(b);CHECK,OGATE,XS(C)::QAB(E),XB(b)
  • Tries
    • Try
      • Q(E);CHECK,XS(d)
      • Vars
        • R(f);OGATE,P_SPINR(f)::QAB(E)
        • B(b);N_GUARD,N_PINS(C)::QAR2(E),XB(b)
      • Refutation
        • P(e);P_SPINP(e)
  • Actual
    • R(G);
    • Threat
      • B(D)
    • Vars
      • B(b);CHECK,OGATE,XS(C)::QAB(E),XB(b)
      • R(f);N_GUARD,XB(D)::S(F),XP(e)
      • B(b);N_PINS(C),N_SPINB(a)::S(C)
      • B(b);OGATEB::B(D),XB(b)
      • B(b);N_PINS(C),N_SPINS(d)::S(C)
      • P(e);N_GUARD,N_SPINS(d)::R1(G)
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