MESON Chess Problem Database

Problem Display
PID: 235524 (1r6/1qBp2pb/1p1b4/4k1K1/1N3pR1/2Pnn3/Q1BPR3/8 w - - 0 1)

Dikusarov, Andrey Nikolayovich

Schach, 2016

1r6/1qBp2pb/1p1b4/4k1K1/1N3pR1/2Pnn3/Q1BPR3/8

#2

9 + 11

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Ke4
      • 2.Rxe3#
    • 1...Qd5
      • 2.Qxd5#
    • 1...Qa6
      • 2.Qd5#
    • 1...Qc8
      • 2.Qd5#
    • 1...Qa7
      • 2.Qd5#
    • 1...Qxc7
      • 2.Qd5#
    • 1...Sc1
      • 2.d4#
    • 1...Se1
      • 2.d4#
    • 1...Sb2
      • 2.d4#
    • 1...Sf2
      • 2.d4#
    • 1...Sxb4
      • 2.d4#
    • 1...Sc5
      • 2.d4#
  • Tries
    • 1.Sxd3+?
      • 1...Ke4
        • 2.Rxe3#
      • 1...Bxd3!
    • 1.Bxd6+?
      • 1...Ke4
        • 2.Rxe3#
        • 2.Rxf4#
      • 1...Kxd6!
    • 1.Rxe3+?
      • 1...Qe4
        • 2.Sxd3#
        • 2.Qd5#
      • 1...Be4
        • 2.Sxd3#
      • 1...fxe3!
  • Keys
    • 1.Qf7!
      • threat
        • 2.Qe7#
      • 1...Ke4
        • 2.Rxe3#
      • 1...Qxc7
        • 2.Qd5#
      • 1...Sxb4
        • 2.d4#
      • 1...Qd5
        • 2.Qxd5#
      • 1...Re8
        • 2.Qxe8#
      • 1...Bf5
        • 2.Qxf5#
      • 1...Bg8
        • 2.Qf5#
      • 1...Sc5
        • 2.d4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • K(d);N_SPINB(f),N_SPINS(b),P-FLIGHT,P_SPINP(c),P_SPINS(a)::R1(D),XS(b)
    • Q(g);N_GUARD::QAR1(A),XQ(g)
    • Q(g);N_GUARD::QAR1(A)
    • Q(g);N_GUARD,N_SPINB(f),XB(I)::QAR1(A)
    • S(a);OGATE::P(C)
    • S(a);OGATE,XS(F)::P(C)
  • Tries
    • Try
      • S(F);CHECK,XS(a)
      • Vars
        • K(d);N_SPINB(f),P-FLIGHT,P_SPINP(c)::R1(D),XS(b)
      • Refutation
        • B(j);XS(F)
    • Try
      • B(I);CHECK,XB(f)
      • Refutation
        • K(d);N_SPINS(b),S_FLIGHT,XB(I)
    • Try
      • R(D);CHECK,XS(b)
      • Vars
        • B(j);N_SPINB(f),P_SPINB(j)::S(F),XS(a)
      • Refutation
        • P(c);XR(D)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A)
    • Vars
      • K(d);N_SPINB(f),N_SPINS(b),P-FLIGHT,P_SPINP(c),P_SPINS(a)::R1(D),XS(b)
      • Q(g);N_GUARD,N_SPINB(f),XB(I)::QAR1(A)
      • S(a);OGATE,XS(F)::P(C)
      • Q(g);N_GUARD::QAR1(A),XQ(g)
      • R(k);N_GUARD::QAR(A),XR(k)
      • B(j);N_GUARD::QAR1(A),XB(j)
      • B(j);N_GUARD::QAR1(A)
      • S(a);OGATE::P(C)
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