MESON Chess Problem Database

Problem Display
PID: 64305 (4K3/8/2NN4/p2k2b1/p7/5r1n/6QB/2RnR2b w - - 0 1)

Schiffmann, Israel Abraham

Grantham Journal, 1928

4K3/8/2NN4/p2k2b1/p7/5r1n/6QB/2RnR2b

#2

7 + 8

81 Chess 1946
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Be3
      • 2.Qa2#
    • 1...Bf6
      • 2.Qg8#
  • Tries
    • 1.Sb4+?
      • 1...Kd4
        • 2.Sb5#
        • 2.Be5#
        • 2.Rc4#
        • 2.Re4#
      • 1...axb4!
    • 1.Qd2+?
      • 1...Rd3
        • 2.Qxa5#
        • 2.Qxd3#
      • 1...Bxd2!
    • 1.Qxg5+?
      • 1...Rf5
        • 2.Qd2#
        • 2.Qxf5#
      • 1...Sxg5!
  • Keys
    • 1.Kd7!
      • threat
        • 2.Re5#
      • 1...Be3
        • 2.Qa2#
      • 1...Bf4
        • 2.Qg8#
      • 1...Bf6
        • 2.Qg8#
      • 1...Se3
        • 2.Qd2#

This anticipates 158641(1933)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • B(h);::QAB(C)
    • B(h);OGATE::QAB(C)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • P(f);XS(E)
    • Try
      • Q(C);CHECK,N_PINR(c)
      • Refutation
        • B(h);XQ(C)
    • Try
      • Q(C);CHECK,N_PINR(c),XB(h)
      • Refutation
        • S(d);XQ(C)
  • Actual
    • K(G);S_FLIGHT
    • Threat
      • R1(B)
    • Vars
      • B(h);::QAB(C)
      • B(h);OGATE::QAB(C)
      • S(a);S_CUTB(h)::QAR(C)
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