MESON Chess Problem Database

Problem Display
PID: 11688 (5Q2/8/R7/1N6/2Npk3/8/8/5K2 w - - 0 1)

Lokker, Miklosh S

Sp. Prize, 64 Shakhmatnoe obozrenie, 1971

5Q2/8/R7/1N6/2Npk3/8/8/5K2

#2

5 + 2

2012 Miniature Chess Problems from Many Countries 1981
3296 Shakhmatny zadachi miniaturi 1987
5454 Near Snap 2009

SOLUTION

  • SOUND
  • Tries
    • 1.Sba3?
      • 1...Kd3
        • 2.Qf3#
      • 1...Kd5
        • 2.Qf5#
      • 1...d3!
    • 1.Sbd6+?
      • 1...Kd5
        • 2.Qf5#
      • 1...Kd3!
    • 1.Rc6?
      • 1...Kd3
        • 2.Qf5#
      • 1...Kd5
        • 2.Qf3#
      • 1...d3!
    • 1.Rd6?
      • threat
        • 2.Rxd4#
      • 1...d3
        • 2.Sc3#
        • 2.Rd4#
      • 1...Kd3!
    • 1.Qf6?
      • 1...Kd5
        • 2.Qxd4#
        • 2.Qc6#
      • 1...d3
        • 2.Sc3#
      • 1...Kd3!
  • Keys
    • 1.Qf2!
      • 1...Kd3
        • 2.Qe2#
      • 1...Kd5
        • 2.Qxd4#
      • 1...d3
        • 2.Sc3#

This anticipates 12313(1977)

This is a version of 11683

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(C);
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • P(a);
    • Try
      • S(C);CHECK
      • Vars
        • K(b);S_FLIGHT::QAR2(E)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • R(D);
      • Vars
        • K(b);S_FLIGHT::QAB(E)
      • Refutation
        • P(a);
    • Try
      • R(D);
      • Threat
        • R1(D),XP(a)
      • Refutation
        • K(b);P_SPINP(a),S_FLIGHT
    • Try
      • Q(E);
      • Vars
        • P(a);N_GUARD,SBLOCK::S(C)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • Q(E);
    • Vars
      • K(b);S_FLIGHT::QAB1(E)
      • K(b);S_FLIGHT::QAR1(E),XP(a)
      • P(a);N_GUARD,SBLOCK::S(C)
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