MESON Chess Problem Database

Problem Display
PID: 231437 (8/8/1p6/1P6/B7/BR2K3/2k5/8 w - - 0 1)

Schiffert, Gyorgy

Magyar Sakkvilag, 1927

8/8/1p6/1P6/B7/BR2K3/2k5/8

#2

5 + 2

6490 yacpdb 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kd1
      • 2.Rb1#
  • Tries
    • 1.Kf2?
      • 1...Kd1
        • 2.Rd3#
      • 1...Kd2!
    • 1.Bb4?
      • 1...Kd1
        • 2.Rb1#
      • 1...Kc1!
    • 1.Bd6?
      • 1...Kd1
        • 2.Rb1#
      • 1...Kc1!
    • 1.Be7?
      • 1...Kd1
        • 2.Rb1#
      • 1...Kc1!
    • 1.Bf8?
      • 1...Kd1
        • 2.Rb1#
      • 1...Kc1!
    • 1.Rb1+?
      • 1...Kc3
        • 2.Rc1#
      • 1...Kxb1!
  • Keys
    • 1.Rb2+!
      • 1...Kc1
        • 2.Rb4#
      • 1...Kc3
        • 2.Rc2#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 1
  • Sets
    • K(a);S_FLIGHT::B(D)+R(B),DCHECK
  • Tries
    • Try
      • K(C);S_FLIGHT
      • Vars
        • K(a);S_FLIGHT::B(D)+R(B),DCHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(D)+R(B),DCHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(D)+R(B),DCHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(D)+R(B),DCHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • B(A);
      • Vars
        • K(a);S_FLIGHT::B(D)+R(B),DCHECK
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(B);CHECK
      • Vars
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XR(B)
  • Actual
    • R(B);CHECK
    • Vars
      • K(a);P-FLIGHT::B(A)+R(B)
      • K(a);P-FLIGHT::R1(B)
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