MESON Chess Problem Database

Problem Display
PID: 140593 (2K1n3/7Q/2RpNp2/3kp3/1npNRP2/3p2bB/8/8 w - - 0 1)

Pankratiev, Aleksandr Nikolaevich

Die Schwalbe, 2010

2K1n3/7Q/2RpNp2/3kp3/1npNRP2/3p2bB/8/8

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Sc7
      • 2.Sxc7#
    • 1...Sg7
      • 2.Sc7#
    • 1...exf4
      • 2.Qf5#
  • Tries
    • 1.Bg2?
      • threat
        • 2.Rxe5#
      • 1...exd4
        • 2.Re1#
        • 2.Re2#
        • 2.Re3#
        • 2.Re5#
      • 1...exf4
        • 2.Qf5#
      • 1...Bxf4!
    • 1.Re3?
      • threat
        • 2.Qe4#
      • 1...e4
        • 2.Qxe4#
        • 2.Qf5#
      • 1...f5!
    • 1.Rxd6+?
      • 1...Kxd6
        • 2.Qd7#
      • 1...Sxd6+!
    • 1.Qb7?
      • threat
        • 2.Rc5#
      • 1...Sxc6
        • 2.Qxc6#
      • 1...Kxe4!
  • Keys
    • 1.Sf5!
      • threat
        • 2.Se7#
      • 1...Kxe4
        • 2.Bg2#
      • 1...Kxc6
        • 2.Qb7#
      • 1...Kxe6
        • 2.Qg8#
      • 1...Sxc6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • S(i);N_GUARD::S(F),XS(i)
    • S(i);N_GUARD::S(F)
    • P(f);OGATEB,XP(D)::QAR2(G)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A)+R(C),DCHECK,XP(f)
      • Vars
        • P(f);OGATEB,XP(D)::QAR2(G)
      • Refutation
        • B(b);XP(D)
    • Try
      • R(C);
      • Threat
        • QAB1(G)
      • Refutation
        • P(h);
    • Try
      • R(E);CHECK,XP(g)
      • Vars
        • K(e);P-FLIGHT,XR(E)::QAR1(G)
      • Refutation
        • S(i);CHECK,XR(E)
    • Try
      • Q(G);
      • Threat
        • QAB(G)+R(E),DCHECK
      • Vars
        • S(c);OGATE,P_SPINS(c),XR(E)::QAB1(G),XS(c)
      • Refutation
        • K(e);S_FLIGHT,XR(C)
  • Actual
    • S(B);
    • Threat
      • S(B)
    • Vars
      • K(e);OGATEB,S_FLIGHT,XR(C)::B(A)
      • K(e);OGATEB,S_FLIGHT,XR(E)::QAB1(G)
      • K(e);OGATEB,P_SPINP(f),S_FLIGHT,XS(F)::QAB(G)
      • S(c);SBLOCK,XR(E)::S(B)
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