MESON Chess Problem Database

Problem Display
PID: 227793 (8/8/1N2p3/4R3/1kp5/8/1K6/1R6 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1926

8/8/1N2p3/4R3/1kp5/8/1K6/1R6

#2

4 + 3

6490 yacpdb 2020

SOLUTION

  • SOUND
  • Sets
    • 1...c3+
      • 2.Ka2#
  • Tries
    • 1.Ka1+?
      • 1...Ka3
        • 2.Ra5#
      • 1...Kc3!
    • 1.Kc1+?
      • 1...Ka3
        • 2.Ra5#
      • 1...Kc3!
    • 1.Rg5?
      • 1...c3+
        • 2.Ka2#
      • 1...e5!
    • 1.Rh5?
      • 1...c3+
        • 2.Ka2#
      • 1...e5!
  • Keys
    • 1.Kc2+!
      • 1...Ka3
        • 2.Ra5#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • P(b);CHECK,SBLOCK::R(A)+K(B)
  • Tries
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::R(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • K(B);CHECK,S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::R(C)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • R(C);
      • Vars
        • P(b);CHECK,SBLOCK::R(A)+K(B)
      • Refutation
        • P(c);
    • Try
      • R(C);
      • Vars
        • P(b);CHECK,SBLOCK::R(A)+K(B)
      • Refutation
        • P(c);
  • Actual
    • K(B);CHECK,P-FLIGHT
    • Vars
      • K(a);S_FLIGHT::R(C)
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