MESON Chess Problem Database

Problem Display
PID: 109701 (3bb3/2pp4/6pp/3p3k/7p/4QK1p/8/8 w - - 0 1)

White, John A

Montreal Daily Witness, 1901

3bb3/2pp4/6pp/3p3k/7p/4QK1p/8/8

#2

2 + 10

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...g5
      • 2.Qxe8#
  • Tries
    • 1.Qd4?
      • threat
        • 2.Qg4#
      • 1...Kg5
        • 2.Qe5#
      • 1...g5!
    • 1.Qe4?
      • threat
        • 2.Qg4#
      • 1...Kg5
        • 2.Qe5#
      • 1...g5
        • 2.Qxe8#
      • 1...dxe4+!
    • 1.Qe5+?
      • 1...g5
        • 2.Qxe8#
      • 1...Bg5!
    • 1.Qe6?
      • threat
        • 2.Qg4#
      • 1...Kg5
        • 2.Qe5#
      • 1...g5
        • 2.Qxe8#
      • 1...dxe6!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Kf4#
      • 1...Kg5
        • 2.Qe5#
      • 1...Bg5
        • 2.Kf2#
      • 1...g5
        • 2.Qxe8#

This anticipates 49829(1909)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(e);OGATEB,SBLOCK::QAB(A),XB(j)
  • Tries
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
      • Refutation
        • P(e);
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
        • P(e);OGATEB,SBLOCK::QAB(A),XB(j)
      • Refutation
        • P(c);CHECK,XQ(A)
    • Try
      • Q(A);CHECK
      • Vars
        • P(e);OGATEB,P_SPINP(e),SBLOCK::QAB(A),XB(j)
      • Refutation
        • B(i);P_SPINB(i)
    • Try
      • Q(A);
      • Threat
        • QAB1(A)
      • Vars
        • K(d);P-FLIGHT::QAR2(A)
        • P(e);OGATEB,SBLOCK::QAB(A),XB(j)
      • Refutation
        • P(h);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAB(A)+K(B)
    • Vars
      • K(d);P-FLIGHT::QAR2(A)
      • B(i);SBLOCK::QAB(A)+K(B)
      • P(e);OGATEB,SBLOCK::QAB(A),XB(j)
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