MESON Chess Problem Database

Problem Display
PID: 92255 (8/3NK3/8/3k4/2p5/R1Q5/8/8 w - - 0 1)

Decker, Adolfph L

Akademische Monatshefte fur Schach, 1901

8/3NK3/8/3k4/2p5/R1Q5/8/8

#2

4 + 2

3713 Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Qe5#
  • Tries
    • 1.Ra7?
      • 1...Kc6
        • 2.Qxc4#
      • 1...Ke4!
    • 1.Qa5+?
      • 1...Kd4
        • 2.Qe5#
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6!
    • 1.Qf6?
      • 1...Ke4
        • 2.Qe5#
      • 1...c3!
  • Keys
    • 1.Rb3!
      • 1...Ke4
        • 2.Qe5#
      • 1...Kc6
        • 2.Qxc4#
      • 1...cxb3
        • 2.Sf6#

This anticipates 110520(1960)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);S_FLIGHT::QAR1(B)
  • Tries
    • Try
      • R(A);
      • Vars
        • K(b);P_SPINP(a),S_FLIGHT::QAR2(B),XP(a)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • K(b);OGATE,P-FLIGHT::QAB1(B)
        • K(b);OGATE,S_FLIGHT::QAR1(B)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(B);
      • Vars
        • K(b);S_FLIGHT::QAR1(B)
      • Refutation
        • P(a);
  • Actual
    • R(A);
    • Vars
      • K(b);S_FLIGHT::QAR1(B)
      • K(b);P_SPINP(a),S_FLIGHT::QAR2(B),XP(a)
      • P(a);XR(A)::S(C)
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