MESON Chess Problem Database

Problem Display
PID: 202996 (8/1Qp2p2/p1R2P2/P4P2/4k3/4P2P/K1R2P2/8 w - - 0 1)

Berhausen, Fritz

Funkschach, 1926

8/1Qp2p2/p1R2P2/P4P2/4k3/4P2P/K1R2P2/8

#2

10 + 4

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.R6c3#
    • 1...Kf3
      • 2.Rxc7#
  • Tries
    • 1.R6c5+?
      • 1...Kd3
        • 2.R5c3#
        • 2.Qd5#
      • 1...c6!
    • 1.Re6+?
      • 1...Kd3
        • 2.Qe4#
        • 2.Qb3#
      • 1...Kxf5!
    • 1.Qb4+?
      • 1...Kd3
        • 2.Rd2#
        • 2.R6c3#
        • 2.Qc4#
        • 2.Qd4#
      • 1...Kf3
        • 2.Qg4#
      • 1...Kd5
        • 2.R2c5#
        • 2.Qd4#
      • 1...Ke5
        • 2.R2c5#
      • 1...Kxf5!
    • 1.Qb5?
      • 1...Kf3
        • 2.Qd5#
      • 1...axb5!
  • Keys
    • 1.Qb1!
      • 1...Kd3
        • 2.Rb2#
      • 1...Kf3
        • 2.Qh1#
      • 1...Kd5
        • 2.R2c5#
      • 1...Ke5
        • 2.R2c5#
      • 1...Kxf5
        • 2.R2c5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(a);S_FLIGHT::R1(H)
    • K(a);S_FLIGHT::QAB(J)+R(H),XP(c)
  • Tries
    • Try
      • R(H);CHECK
      • Refutation
        • P(c);P_SPINP(c)
    • Try
      • R(H);CHECK
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(J);CHECK
      • Vars
        • K(a);OGATE,S_FLIGHT::QAB1(J)
        • K(a);P-FLIGHT::R(B)
      • Refutation
        • K(a);S_FLIGHT,XP(G)
    • Try
      • Q(J);
      • Vars
        • K(a);S_FLIGHT::QAB(J)
      • Refutation
        • P(b);XQ(J)
  • Actual
    • Q(J);
    • Vars
      • K(a);S_FLIGHT::QAB(J)+R(B)
      • K(a);S_FLIGHT::QAB(J)
      • K(a);S_FLIGHT::R1(B)
      • K(a);P-FLIGHT::R(B)
      • K(a);S_FLIGHT,XP(G)::QAB(J)+R(B),DCHECK
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