MESON Chess Problem Database

Problem Display
PID: 157731 (7b/K1R5/1Q2P3/4kPP1/pPpNp1p1/2p1r3/8/3q4 w - - 0 1)

Palkoska, Emil

Manchester Weekly Times, 1901

7b/K1R5/1Q2P3/4kPP1/pPpNp1p1/2p1r3/8/3q4

#2

8 + 9

15148 Sadier Collection 2016
14868 Pirnie Collection 2018
5454 Near Snap 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd5
      • 2.Qc5#
  • Tries
    • 1.Rc5+?
      • 1...Kxd4
        • 2.Qd8#
        • 2.Qd6#
      • 1...Kf4!
    • 1.Qa5+?
      • 1...Kxd4
        • 2.Rd7#
      • 1...Kd6
        • 2.Rd7#
        • 2.Qc5#
      • 1...Kf4!
    • 1.Qb5+?
      • 1...Kxd4
        • 2.Rd7#
      • 1...Kd6
        • 2.Rd7#
        • 2.Qc5#
      • 1...Kf4!
  • Keys
    • 1.Qb8!
      • threat
        • 2.Rd7#
      • 1...Qxd4+
        • 2.Rc5#
      • 1...Kxd4
        • 2.Rd7#
      • 1...Kf4
        • 2.Rg7#
      • 1...Kd5
        • 2.Rd7#
      • 1...Kd6
        • 2.Rd7#

This anticipates 66363(1905), 201425(1922)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • K(h);P-FLIGHT::QAR1(E)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);S_FLIGHT,XS(B)::R(H)
      • Refutation
        • K(h);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);S_FLIGHT,XS(B)::R(H)
      • Refutation
        • K(h);S_FLIGHT
  • Actual
    • Q(E);
    • Threat
      • QAB(E)+R(H)
    • Vars
      • Q(a);CHECK,SBLOCK,XS(B)::QAB(E)+R(H),DCHECK
      • K(h);S_FLIGHT,XS(B)::R(H)
      • K(h);S_FLIGHT::QAB(E)+R(H)
      • K(h);P-FLIGHT::R(H)
      • K(h);S_FLIGHT::QAB(E)+R(H),DCHECK
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