MESON Chess Problem Database

Problem Display
PID: 78890 (1Q2Rr1B/4pp2/4Pr2/1PNk1p1q/4Np2/1P2bp1B/2K1R3/8 w - - 0 1)

Pituk, Alexander

5th Prize, Schweizerische Arbeiter Schach Journal, 1942

1Q2Rr1B/4pp2/4Pr2/1PNk1p1q/4Np2/1P2bp1B/2K1R3/8

#2

11 + 10

5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rg6
      • 2.Qe5#
      • 2.Qb7#
      • 2.Qa8#
      • 2.Qd8#
    • 1...Rh6
      • 2.Qe5#
      • 2.Qb7#
      • 2.Qa8#
      • 2.Qd8#
    • 1...Bd2
      • 2.Rxd2#
  • Tries
    • 1.Bxf6?
      • threat
        • 2.Qe5#
        • 2.Qb7#
        • 2.Qa8#
        • 2.Qd8#
      • 1...Rxe8
        • 2.Qe5#
        • 2.Qb7#
      • 1...Bxc5
        • 2.Sc3#
        • 2.Qe5#
      • 1...exf6
        • 2.Qd6#
      • 1...Bd4
        • 2.Qb7#
        • 2.Qa8#
        • 2.Qd8#
      • 1...fxe4!
  • Keys
    • 1.Sd3!
      • threat
        • 2.Qe5#
      • 1...Kd4
        • 2.Qe5#
      • 1...Kxe4
        • 2.Qe5#
      • 1...Kxe6
        • 2.Qd6#
      • 1...Rxe6
        • 2.Sc3#
      • 1...fxe4
        • 2.Qd8#
      • 1...Bd4
        • 2.Sxf4#

This anticipates 79795(1961), 104356(2003)

There are these versions: 110824

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • B(a);N_GUARD::R(B),XB(a)
  • Tries
    • Try
      • B(K);XR(g)
      • Threat
        • DUALS(4)
      • Vars
        • P(h);N_GUARD,XB(K)::QAR1(I)
      • Refutation
        • P(e);XS(E)
  • Actual
    • S(G);
    • Threat
      • QAR1(I)
    • Vars
      • K(d);P-FLIGHT,P_SPINR(g)::QAB1(I)
      • K(d);P_SPINB(a),S_FLIGHT,XS(E)::QAR1(I)
      • K(d);P_SPINP(e),S_FLIGHT,XP(H)::QAR1(I)
      • R(g);SBLOCK,XP(H)::S(E)
      • P(e);SBLOCK,XS(E)::QAR(I)
      • B(a);N_GUARD,SBLOCK::S(G),XP(c)
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