MESON Chess Problem Database

Problem Display
PID: 181103 (4N3/3B4/7B/3k4/R1p5/8/3P3K/3Q4 w - - 0 1)

Gold, Samuel

Checkmate, 1904

4N3/3B4/7B/3k4/R1p5/8/3P3K/3Q4

#2

7 + 2

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...c3
      • 2.Qh5#
  • Tries
    • 1.Rxc4?
      • 1...Ke5
        • 2.Qh5#
      • 1...Kxc4!
    • 1.Qf3+?
      • 1...Kc5
        • 2.Be3#
      • 1...Ke5
        • 2.Bg7#
      • 1...Kd4!
    • 1.Qg4?
      • threat
        • 2.Ra5#
      • 1...Ke5
        • 2.Ra5#
      • 1...Kc5!
  • Keys
    • 1.d4!
      • 1...Ke4
        • 2.Sf6#
      • 1...cxd4 ep
        • 2.Qh5#
      • 1...c3
        • 2.Qf3#
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • P(a);::QAR(A)
  • Tries
    • Try
      • R(D);XP(a)
      • Vars
        • K(b);P-FLIGHT::QAR(A)
      • Refutation
        • K(b);S_FLIGHT,XR(D)
    • Try
      • Q(A);CHECK
      • Vars
        • K(b);P-FLIGHT::B(E)
      • Refutation
        • K(b);P-FLIGHT,P_SPINP(a)
    • Try
      • Q(A);
      • Threat
        • R(D)
      • Vars
        • K(b);P-FLIGHT::R(D)
      • Refutation
        • K(b);P-FLIGHT
  • Actual
    • P(B);
    • Vars
      • K(b);S_FLIGHT::S(G)
      • P(a);EP,P_SPINP(a),XP(B)::QAR(A)
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