MESON Chess Problem Database

Problem Display
PID: 110520 (8/3KN3/8/4k3/5p2/5Q1R/8/8 w - - 0 1)

Dimitrov, Nikolai

Shakhmatna misl, 1960

8/3KN3/8/4k3/5p2/5Q1R/8/8

#2

4 + 2

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Kd4
      • 2.Qd5#
  • Tries
    • 1.Rh7?
      • 1...Kf6
        • 2.Qxf4#
      • 1...Kd4!
    • 1.Qh5+?
      • 1...Kd4
        • 2.Qd5#
      • 1...Ke4
        • 2.Qd5#
      • 1...Kf6!
    • 1.Qc6?
      • 1...Kd4
        • 2.Qd5#
      • 1...f3!
  • Keys
    • 1.Rg3!
      • 1...Kd4
        • 2.Qd5#
      • 1...Kf6
        • 2.Qxf4#
      • 1...fxg3
        • 2.Sc6#

Anticipated by 92255(1901)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(A)
  • Tries
    • Try
      • R(B);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR2(A),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
        • K(b);OGATE,P-FLIGHT::QAB1(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);
      • Vars
        • K(b);S_FLIGHT::QAR1(A)
      • Refutation
        • P(a);
  • Actual
    • R(B);
    • Vars
      • K(b);S_FLIGHT::QAR1(A)
      • K(b);P_SPINP(a),S_FLIGHT::QAR2(A),XP(a)
      • P(a);XR(B)::S(D)
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