MESON Chess Problem Database

Problem Display
PID: 231543 (8/3R4/1p6/1k1p4/3P4/2K5/Q7/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/3R4/1p6/1k1p4/3P4/2K5/Q7/8

#2

4 + 3

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qxd5#
  • Tries
    • 1.Kb2?
      • 1...Kc6
        • 2.Qxd5#
      • 1...Kb4!
    • 1.Kc2?
      • 1...Kc6
        • 2.Qxd5#
      • 1...Kb4!
    • 1.Kd2?
      • 1...Kc6
        • 2.Qxd5#
      • 1...Kb4!
    • 1.Kd3?
      • 1...Kc6
        • 2.Qxd5#
      • 1...Kb4!
    • 1.Qc4+?
      • 1...Ka5
        • 2.Ra7#
      • 1...dxc4!
    • 1.Qxd5+?
      • 1...Ka4
        • 2.Ra7#
      • 1...Ka6!
    • 1.Qe2+?
      • 1...Ka4
        • 2.Ra7#
        • 2.Qa6#
      • 1...Ka5
        • 2.Ra7#
      • 1...Kc6!
  • Keys
    • 1.Qb3+!
      • 1...Ka5
        • 2.Ra7#
      • 1...Ka6
        • 2.Qa4#
      • 1...Kc6
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::QAB1(A),XP(b)
  • Tries
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(B);P-FLIGHT
      • Vars
        • K(a);S_FLIGHT::QAB1(A),XP(b)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • P(b);XQ(A)
    • Try
      • Q(A);CHECK,XP(b)
      • Vars
        • K(a);S_FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • Q(A);CHECK
      • Vars
        • K(a);P-FLIGHT::R(D)
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • Q(A);CHECK
    • Vars
      • K(a);P-FLIGHT::R(D)
      • K(a);S_FLIGHT::QAR2(A)
      • K(a);S_FLIGHT::QAB1(A),XP(b)
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