MESON Chess Problem Database

Problem Display
PID: 7995 (3QK3/8/8/1k6/NN6/8/2P5/8 w - - 0 1)

Rice, John Michael

Chess Problems for Solving, 1995

3QK3/8/8/1k6/NN6/8/2P5/8

#2

5 + 1

5454 Near Snap 2008

SOLUTION

  • SOUND
  • Tries
    • 1.Sa2?
      • 1...Kc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kxa4!
    • 1.Sa6?
      • 1...Kc4
        • 2.Qd3#
      • 1...Kxa6
        • 2.Qb6#
      • 1...Kc6
        • 2.Qd7#
      • 1...Kxa4!
    • 1.Qa5+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxa5!
    • 1.Qb6+?
      • 1...Kc4
        • 2.Qc5#
      • 1...Kxa4!
    • 1.c3?
      • 1...Kc4
        • 2.Qd5#
      • 1...Kxa4!
  • Keys
    • 1.Sc6!
      • 1...Kxa4
        • 2.Qa5#
      • 1...Kc4
        • 2.Qd3#
      • 1...Ka6
        • 2.Qb6#
      • 1...Kxc6
        • 2.Qd7#

Anticipated by 5043(1898), 201345(1922), 76207(1926), 16695(1942), 176153(1953), 110513(1955), 176168(1959), 104712(1969)

This anticipates 103493(1996), 163136(2013)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • S(C);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
        • K(a);S_FLIGHT,XS(C)::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);P-FLIGHT,XQ(D)
    • Try
      • Q(D);CHECK
      • Vars
        • K(a);S_FLIGHT::QAR1(D)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
    • Try
      • P(A);
      • Vars
        • K(a);S_FLIGHT::QAB1(D)
      • Refutation
        • K(a);S_FLIGHT,XS(B)
  • Actual
    • S(C);
    • Vars
      • K(a);S_FLIGHT,XS(B)::QAR1(D)
      • K(a);S_FLIGHT::QAB1(D)
      • K(a);S_FLIGHT::QAR1(D)
      • K(a);OGATEB,S_FLIGHT,XS(C)::QAB1(D)
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