MESON Chess Problem Database

Problem Display
PID: 133517 (8/B7/B1b5/8/1Q2prpb/Rn2R3/3P1k2/6NK w - - 0 1)

Markov, Evgeny Viktorovich

Polin, Genady

Probleemblad, 2008

8/B7/B1b5/8/1Q2prpb/Rn2R3/3P1k2/6NK

#2

8 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Sa1
      • 2.Rxe4#
    • 1...Sc1
      • 2.Rxe4#
    • 1...Sxd2
      • 2.Rxe4#
      • 2.Qxd2#
    • 1...Sa5
      • 2.Rxe4#
    • 1...g3
      • 2.Sh3#
  • Tries
    • 1.Re2+?
      • 1...Kg3
        • 2.Rg2#
      • 1...Kf1!
    • 1.Rexb3+?
      • 1...Ke1
        • 2.Ra1#
        • 2.Rb1#
      • 1...e3+!
    • 1.Rxe4+?
      • 1...Sd4
        • 2.Bxd4#
        • 2.Qxd4#
      • 1...Sc5
        • 2.Bxc5#
        • 2.Qxc5#
        • 2.Qd4#
      • 1...Kg3!
  • Keys
    • 1.d4!
      • threat
        • 2.Qe1#
      • 1...exd4 ep+
        • 2.Rf3#
      • 1...Kxe3
        • 2.d5#
      • 1...Sd2
        • 2.Qxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(b);N_GUARD::B(H)+R(E),XP(c)
    • P(e);N_GUARD::S(A)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(a);OGATE,P_SPINS(b),S_FLIGHT::R1(E)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(E);CHECK,XS(b)
      • Refutation
        • P(c);CHECK,P_SPINP(c)
    • Try
      • R(E);CHECK,P_SPINR(E),XP(c)
      • Refutation
        • K(a);P_SPINS(b),S_FLIGHT
  • Actual
    • P(C);
    • Threat
      • QAB1(F)
    • Vars
      • P(c);CHECK,EP,N_GUARD,XP(C)::B(H)+R(E),DCHECK
      • K(a);P_SPINS(b),S_FLIGHT,XR(E)::B(H)+P(C)
      • S(b);N_GUARD::QAR2(F),XS(b)
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