MESON Chess Problem Database

Problem Display
PID: 48884 (8/6bN/1K1p3Q/1n1kp3/R7/2PN4/8/8 w - - 0 1)

Underwood, HF

Chess Life, 1948

8/6bN/1K1p3Q/1n1kp3/R7/2PN4/8/8

#2

6 + 5

459 Nebraska Chess Bulletin 1951

SOLUTION

  • SOUND
  • Tries
    • 1.Qh1+?
      • 1...e4
        • 2.Qxe4#
      • 1...Ke6!
    • 1.Qg6?
      • threat
        • 2.Qf7#
      • 1...Sd4
        • 2.c4#
      • 1...Sc7!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Qe6#
      • 1...Bxh6
        • 2.Sf6#
      • 1...dxc5
        • 2.Qc6#
      • 1...Bf6
        • 2.Sxf6#
      • 1...Sd4
        • 2.c4#
      • 1...Sc7
        • 2.Qd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • Q(E);CHECK
      • Vars
        • P(c);P_SPINP(c)::QAB1(E),XP(c)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);
      • Threat
        • QAB(E)
      • Vars
        • S(a);SBLOCK::P(A)
      • Refutation
        • S(a);
  • Actual
    • S(B);
    • Threat
      • QAB1(E)
    • Vars
      • B(e);N_GUARD,XQ(E)::S(F)
      • P(d);OGATE,XS(B)::QAB1(E)
      • B(e);N_GUARD::S(F),XB(e)
      • S(a);SBLOCK::P(A)
      • S(a);N_GUARD::QAR(E)
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