MESON Chess Problem Database

Problem Display
PID: 170500 (rR1R2Qr/2pKPP2/5B2/7B/5p2/PN1kpNpp/b4nq1/1n3b2 w - - 0 1)

Baier, Roland

Basler Nachrichten, 1975

rR1R2Qr/2pKPP2/5B2/7B/5p2/PN1kpNpp/b4nq1/1n3b2

#2

11 + 13

6490 yacpdb 2018
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc2
      • 2.Se1#
  • Tries
    • 1.Kc6+?
      • 1...Ke2
        • 2.Sc1#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke4
        • 2.Qg6#
      • 1...Kc2!
    • 1.Ke6+?
      • 1...Kc2
        • 2.Se1#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke4
        • 2.Sg5#
        • 2.Rd4#
        • 2.Qg6#
      • 1...Ke2!
    • 1.Kc8+?
      • 1...Kc2
        • 2.Se1#
      • 1...Ke2
        • 2.Sc1#
      • 1...Ke4
        • 2.Qg6#
      • 1...Kc4!
    • 1.Ke8+?
      • 1...Kc2
        • 2.Se1#
      • 1...Ke2
        • 2.Sc1#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke4!
  • Keys
    • 1.Kxc7+!
      • 1...Kc2
        • 2.Se1#
      • 1...Ke2
        • 2.Sc1#
      • 1...Kc4
        • 2.Rb4#
      • 1...Ke4
        • 2.Qg6#

Anticipated by 55660(1962)

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • K(f);S_FLIGHT::S(C)
  • Tries
    • Try
      • K(F);CHECK,P_SPINS(C),S_FLIGHT
      • Vars
        • K(f);S_FLIGHT::S(B)
        • K(f);S_FLIGHT::R1(I)
        • K(f);N_PINS(C),S_FLIGHT::QAB(K)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • K(F);CHECK,P_SPINS(B),S_FLIGHT
      • Vars
        • K(f);S_FLIGHT::S(C)
        • K(f);N_PINS(B),S_FLIGHT::R1(I)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • K(F);CHECK,P_SPINR(I),S_FLIGHT
      • Vars
        • K(f);S_FLIGHT::S(C)
        • K(f);S_FLIGHT::S(B)
        • K(f);S_FLIGHT::QAB(K)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • K(F);CHECK,P_SPINQ(K),S_FLIGHT
      • Vars
        • K(f);S_FLIGHT::S(C)
        • K(f);S_FLIGHT::S(B)
        • K(f);S_FLIGHT::R1(I)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • K(F);CHECK,P-FLIGHT,XP(k)
    • Vars
      • K(f);S_FLIGHT::S(C)
      • K(f);S_FLIGHT::S(B)
      • K(f);S_FLIGHT::R1(I)
      • K(f);S_FLIGHT::QAB(K)
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