MESON Chess Problem Database

Problem Display
PID: 222939 (K7/8/2p5/3k4/3p4/1P3R2/7B/Q7 w - - 0 1)

Pradignat, Emile Leonard

Uber Land und Meer, 1886

K7/8/2p5/3k4/3p4/1P3R2/7B/Q7

#2

5 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kc5
      • 2.Qa5#
    • 1...d3
      • 2.Qe5#
  • Tries
    • 1.Rf6?
      • 1...Kc5
        • 2.Qa5#
      • 1...d3
        • 2.Qe5#
      • 1...c5
        • 2.Qh1#
      • 1...Ke4!
    • 1.Qxd4+?
      • 1...Ke6
        • 2.Qd6#
      • 1...Kxd4!
    • 1.Qe1?
      • threat
        • 2.Rf5#
        • 2.Qe5#
      • 1...Kc5
        • 2.Qa5#
      • 1...d3
        • 2.Qe5#
      • 1...c5!
  • Keys
    • 1.Re3!
      • 1...Kc5
        • 2.Qa5#
      • 1...dxe3
        • 2.Qe5#
      • 1...d3
        • 2.Qe5#
      • 1...c5
        • 2.Qh1#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(b);P-FLIGHT::QAR2(A)
    • P(a);OGATE::QAR1(A)
  • Tries
    • Try
      • R(D);
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(a);OGATE::QAR1(A)
        • P(c);SBLOCK::QAB(A)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • Q(A);CHECK,XP(a)
      • Vars
        • K(b);OGATE,S_FLIGHT::QAR1(A)
      • Refutation
        • K(b);P-FLIGHT,XQ(A)
    • Try
      • Q(A);
      • Threat
        • DUALS(2)
      • Vars
        • K(b);P-FLIGHT::QAR2(A)
        • P(a);::QAR1(A)
      • Refutation
        • P(c);
  • Actual
    • R(D);
    • Vars
      • K(b);P-FLIGHT::QAR2(A)
      • P(a);OGATE,XR(D)::QAR1(A)
      • P(a);OGATE::QAR1(A)
      • P(c);SBLOCK::QAB(A)
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