MESON Chess Problem Database

Problem Display
PID: 164416 (1KB3b1/1P6/3Rn2B/1r2p2R/3Pk3/1p1Np1P1/1N3rp1/2bQ3n w - - 0 1)

Lukashev, Viktor Sergeevich

Sachmatija, 2006

1KB3b1/1P6/3Rn2B/1r2p2R/3Pk3/1p1Np1P1/1N3rp1/2bQ3n

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Rxe5#
    • 1...Rb6
      • 2.Rxe5#
    • 1...Rxb7+
      • 2.Bxb7#
    • 1...Sf4
      • 2.Bf5#
    • 1...Sc5
      • 2.Rxe5#
  • Tries
    • 1.Sxf2+?
      • 1...exf2
        • 2.Qd3#
      • 1...Sxf2!
    • 1.Sc5+?
      • 1...Sxc5
        • 2.Rxe5#
      • 1...Rxc5!
    • 1.Sxe5?
      • threat
        • 2.Qd3#
      • 1...Rxb7+
        • 2.Bxb7#
      • 1...Rxe5
        • 2.Rxe5#
      • 1...Rd2
        • 2.Qf3#
      • 1...Bd2
        • 2.Qb1#
      • 1...Sf4
        • 2.Bf5#
      • 1...Sc5!
    • 1.Qg4+?
      • 1...Sf4
        • 2.Bf5#
      • 1...Rf4!
  • Keys
    • 1.Se1!
      • threat
        • 2.Qd3#
      • 1...Rxb7+
        • 2.Bxb7#
      • 1...Rd2
        • 2.Qf3#
      • 1...Bd2
        • 2.Qb1#
      • 1...Sf4
        • 2.Bf5#
      • 1...Sc5
        • 2.Rxe5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(h);N_GUARD::R1(F),XP(i)
    • R(h);CHECK,OGATE,XP(I)::B(K),XR(h)
    • S(j);OGATE::B(K)
    • S(j);S_CUTR(h)::R1(F),XP(i)
  • Tries
    • Try
      • S(C);CHECK,XR(c)
      • Vars
        • P(f);XS(C)::QAB1(A)
      • Refutation
        • S(b);XS(C)
    • Try
      • S(C);CHECK
      • Vars
        • S(j);XS(C)::R1(F),XP(i)
      • Refutation
        • R(h);N_PINP(I),XS(C)
    • Try
      • S(C);XP(i)
      • Threat
        • QAB1(A)
      • Vars
        • R(h);CHECK,OGATE,XP(I)::B(K),XR(h)
        • R(h);N_PINP(I),OGATE,XS(C)::R1(F),XR(h)
        • R(c);N_GUARD::QAB1(A)
        • B(a);OGATE::QAB(A)
        • S(j);OGATE::B(K)
      • Refutation
        • S(j);
    • Try
      • Q(A);CHECK
      • Vars
        • S(j);OGATE,P_SPINS(j)::B(K)
      • Refutation
        • R(c);P_SPINR(c)
  • Actual
    • S(C);
    • Threat
      • QAB1(A)
    • Vars
      • R(h);CHECK,OGATE,XP(I)::B(K),XR(h)
      • R(c);N_GUARD::QAB1(A)
      • B(a);OGATE::QAB(A)
      • S(j);OGATE::B(K)
      • S(j);S_CUTR(h)::R1(F),XP(i)
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