MESON Chess Problem Database

Problem Display
PID: 153041 (8/q7/8/4K3/8/R3N3/3kNR2/8 w - - 0 1)

Kozhakin, Vladimir Vladimirovich

Schweizerische Schachzeitung, 2001

8/q7/8/4K3/8/R3N3/3kNR2/8

#2

5 + 2

SOLUTION

  • SOUND
  • Tries
    • 1.Sc1+?
      • 1...Ke1
        • 2.Sd3#
        • 2.Re2#
      • 1...Kxc1!
    • 1.Sg1+?
      • 1...Ke1
        • 2.Re2#
      • 1...Kc1!
    • 1.Sg3+?
      • 1...Ke1
        • 2.Re2#
      • 1...Kc1!
    • 1.Sd4+?
      • 1...Ke1
        • 2.Re2#
      • 1...Kc1!
    • 1.Sf4+?
      • 1...Ke1
        • 2.Sd3#
        • 2.Re2#
      • 1...Kc1!
  • Keys
    • 1.Sc3+!
      • 1...Kc1
        • 2.Rc2#
      • 1...Ke1
        • 2.Re2#
      • 1...Kd3
        • 2.Sa4#
      • 1...Kxe3
        • 2.Sd1#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • K(a);S_FLIGHT,XS(A)
    • Try
      • S(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);CHECK
      • Vars
        • K(a);S_FLIGHT::R1(B)
      • Refutation
        • K(a);S_FLIGHT
    • Try
      • S(A);CHECK
      • Refutation
        • K(a);S_FLIGHT
  • Actual
    • S(A);CHECK
    • Vars
      • K(a);OGATE,S_FLIGHT::R1(B)
      • K(a);S_FLIGHT::R1(B)
      • K(a);P-FLIGHT::R(C)+S(A)
      • K(a);S_FLIGHT,XS(D)::R(C)+S(A),DCHECK
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