MESON Chess Problem Database

Problem Display
PID: 56120 (2R1Q3/1p1p3n/r2PP3/RNNk4/1P3Pp1/p2B1b1r/K2Pp1p1/B5b1 w - - 0 1)

Draiska, Imants

3rd Prize, Shakhmaty, 1962

2R1Q3/1p1p3n/r2PP3/RNNk4/1P3Pp1/p2B1b1r/K2Pp1p1/B5b1

#2

13 + 12

3747 FIDE Album (1962-1964) 1968
328 Schweizerische Schachzeitung 1969
133 The Problemist Supplement 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bxc5
      • 2.Rxc5#
    • 1...dxe6
      • 2.Qxe6#
  • Tries
    • 1.Kb3?
      • threat
        • 2.Bc4#
      • 1...Bxc5
        • 2.Rxc5#
      • 1...Be4!
    • 1.Sc3+?
      • 1...Kxd6
        • 2.Qxd7#
      • 1...Kd4!
    • 1.Sc7+?
      • 1...Kxd6
        • 2.Qxd7#
      • 1...Kc6!
    • 1.Qh5+?
      • 1...Sg5
        • 2.Qxg5#
      • 1...Rxh5!
  • Keys
    • 1.Se4!
      • threat
        • 2.Sec3#
      • 1...Bxe4
        • 2.Bc4#
      • 1...Rc6
        • 2.Sc7#
      • 1...Bd4
        • 2.Sbc3#

There are these versions: 165444

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • B(a);OGATE,XS(I)::R1(L),XB(a)
    • P(k);OGATE,XP(K)::QAB1(M),XP(k)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Threat
        • B(D)
      • Vars
        • B(a);OGATE,XS(I)::R1(L),XB(a)
      • Refutation
        • B(e);P_PINB(D)
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P-FLIGHT,XP(J)::QAR1(M),XP(k)
      • Refutation
        • K(h);P-FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P-FLIGHT,XP(J)::QAR1(M),XP(k)
      • Refutation
        • K(h);P_SPINP(k),S_FLIGHT
    • Try
      • Q(M);CHECK
      • Vars
        • S(l);N_GUARD,P_SPINS(l)::QAR(M),XS(l)
      • Refutation
        • R(f);XQ(M)
  • Actual
    • S(I);
    • Threat
      • S(I)
    • Vars
      • B(e);SBLOCK,XS(I)::B(D)
      • R(i);SBLOCK::R(G)+S(H),DCHECK
      • B(a);SBLOCK::R(G)+S(H),DCHECK
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