MESON Chess Problem Database

Problem Display
PID: 69412 (8/K1p5/2P5/8/1kBB4/1P6/nQ1P4/8 w - - 0 1)

van Dijk, Johannes

Tijdschrift vd NSB, 1897

8/K1p5/2P5/8/1kBB4/1P6/nQ1P4/8

#2

7 + 3

5454 Near Snap 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ka5
      • 2.Qa3#
  • Tries
    • 1.Ka6?
      • 1...Sc3
        • 2.dxc3#
      • 1...Sc1!
    • 1.Bc5+?
      • 1...Ka5
        • 2.Qa3#
        • 2.Qxa2#
      • 1...Kxc5!
    • 1.Qc3+?
      • 1...Ka3
        • 2.Qa5#
      • 1...Sxc3!
  • Keys
    • 1.Qa1!
      • 1...Ka3
        • 2.Bc5#
      • 1...Ka5
        • 2.Bc3#
      • 1...Sc1
        • 2.Qa4#
      • 1...Sc3
        • 2.dxc3#

This anticipates 154127(1955)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR2(A)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Vars
        • S(a);OGATE::P(B),XS(a)
      • Refutation
        • S(a);
    • Try
      • B(E);CHECK
      • Refutation
        • K(b);S_FLIGHT,XB(E)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR2(A)
      • Refutation
        • S(a);XQ(A)
  • Actual
    • Q(A);
    • Vars
      • K(b);P_SPINS(a),S_FLIGHT::B(E)
      • S(a);OGATE::QAR1(A)
      • S(a);OGATE::P(B),XS(a)
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