MESON Chess Problem Database

Problem Display
PID: 184787 (8/5n1K/3P4/2Q1pkp1/4R3/7N/2B3P1/8 w - - 0 1)

von Sponer, Gyorgy Janos Andor

Deutsches Wochenschach, 1908

8/5n1K/3P4/2Q1pkp1/4R3/7N/2B3P1/8

#2

7 + 4

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Sxd6
      • 2.Qxe5#
    • 1...Sh6
      • 2.Qxe5#
    • 1...Sd8
      • 2.Qxe5#
    • 1...Sh8
      • 2.Qxe5#
  • Tries
    • 1.Kg7?
      • threat
        • 2.Qc8#
      • 1...Sxd6
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Ke6!
    • 1.Qc4?
      • threat
        • 2.Rf4#
        • 2.Qxf7#
      • 1...Sxd6
        • 2.Rf4#
      • 1...Sh6
        • 2.Rf4#
      • 1...Sd8
        • 2.Rf4#
      • 1...Sh8
        • 2.Rf4#
      • 1...Kf6!
    • 1.Qd5?
      • threat
        • 2.Rf4#
        • 2.Qxf7#
      • 1...Sxd6
        • 2.Rf4#
        • 2.Qxe5#
      • 1...Sh6
        • 2.Rf4#
        • 2.Qxe5#
      • 1...Sd8
        • 2.Rf4#
        • 2.Qxe5#
      • 1...Sh8
        • 2.Rf4#
        • 2.Qxe5#
      • 1...Kf6!
  • Keys
    • 1.Bb3!
      • 1...Kxe4
        • 2.Bc2#
      • 1...Kf6
        • 2.Qf2#
      • 1...Sxd6
        • 2.Qxe5#
      • 1...Sh6
        • 2.Qxe5#
      • 1...Sd8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#
      • 1...g4
        • 2.Rf4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(d);N_GUARD,XP(F)::QAR1(E),XP(a)
    • S(d);N_GUARD::QAR1(E),XP(a)
  • Tries
    • Try
      • K(G);P-FLIGHT
      • Threat
        • QAB(E)
      • Vars
        • S(d);N_GUARD,XP(F)::QAR1(E),XP(a)
        • S(d);N_GUARD::QAR1(E),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(E);N_PINP(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(d);XP(F)::B(A)+R(D),DCHECK
        • S(d);::B(A)+R(D),DCHECK
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Refutation
        • K(b);N_SPINP(a),P-FLIGHT
  • Actual
    • B(A);
    • Vars
      • K(b);N_SPINP(a),OGATEB,S_FLIGHT,XR(D)::B(A)
      • K(b);N_SPINP(a),P-FLIGHT::QAR(E)
      • S(d);N_GUARD,XP(F)::QAR1(E),XP(a)
      • S(d);N_GUARD::QAR1(E),XP(a)
      • P(c);N_GUARD::R1(D)
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