MESON Chess Problem Database

Problem Display
PID: 251837 (5Q1q/B3pr2/4Np2/1K1pkr2/3RB3/4R1P1/8/8 w - - 0 1)

Wiersma, P

Schakend Nederland, 1964

5Q1q/B3pr2/4Np2/1K1pkr2/3RB3/4R1P1/8/8

#2

8 + 7

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...dxe4
      • 2.Rexe4#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Rxd5#
      • 1...dxe4
        • 2.Rexe4#
        • 2.Rd5#
      • 1...e6
        • 2.Bb1#
        • 2.Bh1#
        • 2.Bc2#
        • 2.Bg2#
        • 2.Bd3#
        • 2.Bf3#
        • 2.Bxd5#
      • 1...Kd6!
    • 1.Sd8?
      • threat
        • 2.Rxd5#
      • 1...dxe4
        • 2.Rexe4#
      • 1...e6
        • 2.Sc6#
        • 2.Sxf7#
        • 2.Bb1#
        • 2.Bh1#
        • 2.Bc2#
        • 2.Bg2#
        • 2.Bd3#
        • 2.Bf3#
        • 2.Bxd5#
      • 1...Kd6!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Rxd5#
      • 1...Kxd4
        • 2.Sd7#
      • 1...Kd6
        • 2.Bb8#
      • 1...dxe4
        • 2.Rexe4#
      • 1...e6
        • 2.Sd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • P(a);OGATE,P_SPINP(a),XB(D)::R1(A),XP(a)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(C),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • S(F);
      • Threat
        • R1(C),XP(a)
      • Vars
        • P(a);OGATE,P_SPINP(a),XB(D)::R1(A),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
  • Actual
    • S(F);
    • Threat
      • R1(C),XP(a)
    • Vars
      • K(b);N_GUARD,S_FLIGHT,XR(C)::B(G)+S(F)
      • K(b);N_GUARD,P_SPINP(a),S_FLIGHT::B(G)
      • P(a);OGATE,P_SPINP(a),XB(D)::R1(A),XP(a)
      • P(e);SBLOCK::S(F)
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