MESON Chess Problem Database

Problem Display
PID: 169037 (n7/PkNR1P2/1N1p4/8/1Q5r/8/p3r3/K1R2BBb w - - 0 1)

Kapustin, Fedor Mikhailovich

Novitski, Petr Adrinovich

Sp. HM., SuperProblem 087. TT, 2013

n7/PkNR1P2/1N1p4/8/1Q5r/8/p3r3/K1R2BBb

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Kxa7
      • 2.Sc8#
    • 1...Re1
      • 2.Scxa8#
    • 1...Rb2
      • 2.Scxa8#
    • 1...Rd2
      • 2.Scxa8#
    • 1...Rf2
      • 2.Scxa8#
    • 1...Rg2
      • 2.Scxa8#
    • 1...Reh2
      • 2.Scxa8#
    • 1...Re3
      • 2.Scxa8#
    • 1...Ree4
      • 2.Scxa8#
    • 1...Re5
      • 2.Scxa8#
    • 1...Re6
      • 2.Scxa8#
    • 1...Re8
      • 2.Scxa8#
    • 1...Sxb6
      • 2.a8Q#
    • 1...Sxc7
      • 2.a8Q#
  • Tries
    • 1.Sc4+?
      • 1...Kc6
        • 2.Se5#
        • 2.Qb5#
      • 1...Sb6
        • 2.a8Q#
      • 1...Kc8!
    • 1.Sc8+?
      • 1...Rxb4
        • 2.Sxd6#
      • 1...Sb6
        • 2.a8Q#
      • 1...Kxc8!
    • 1.Sb5+?
      • 1...Sc7
        • 2.a8Q#
      • 1...Ka6!
    • 1.Scd5+?
      • 1...Sc7
        • 2.a8Q#
      • 1...Ka6!
    • 1.Sa6+?
      • 1...Sc7
        • 2.a8Q#
      • 1...Kxa6!
    • 1.Se6+?
      • 1...Sc7
        • 2.a8Q#
      • 1...Ka6!
    • 1.Se8+?
      • 1...Sc7
        • 2.a8Q#
      • 1...Ka6!
  • Keys
    • 1.f8Q!
      • threat
        • 2.Qxa8#
        • 2.Qb8#
      • 1...Kxa7
        • 2.Sc8#
      • 1...Sxb6
        • 2.Qxb6#
        • 2.Qa8#
        • 2.Qb8#
        • 2.a8Q#
      • 1...Sxc7
        • 2.a8Q#
      • 1...Rc2
        • 2.Qxa8#
      • 1...Rc4
        • 2.Qxa8#
      • 1...Re8
        • 2.Scxa8#
      • 1...Rh8
        • 2.Sbxa8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 11
  • Sets
    • K(f);P-FLIGHT,XP(G)::B(D)+S(F),DCHECK
    • R(c);P_PINR(B)::R(I)+S(H),XS(g)
    • R(c);::R(I)+S(H),XS(g)
    • S(g);OGATE,P_SPINS(g),XS(F)::P=Q
    • S(g);OGATE,P_SPINS(g),XS(H)::P=Q
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(F);CHECK
      • Vars
        • R(d);XQ(E)::S(F),XP(e)
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);S_FLIGHT,XS(F)
    • Try
      • S(H);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);P_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);P_SPINR(c),S_FLIGHT,XS(H)
    • Try
      • S(H);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);P_SPINR(c),S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • S(g);OGATE,P_SPINS(g)::P=Q
      • Refutation
        • K(f);P_SPINR(c),S_FLIGHT
  • Actual
    • P(J);
    • Threat
      • DUALS(2)
    • Vars
      • K(f);P-FLIGHT,XP(G)::B(D)+S(F),DCHECK
      • S(g);OGATE,P_SPINS(g),XS(H)::P=Q
      • R(c);::QAB1(J),XS(g)
      • R(d);::QAB1(J),XS(g)
      • R(c);::R(I)+S(H),XS(g)
      • R(d);N_GUARD::QAR(E)+S(F),XS(g)
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