MESON Chess Problem Database

Problem Display
PID: 105435 (5Qbq/nnN1r3/R2bpN2/2k1p1Rp/P1p1B3/P3P3/1P1P3K/8 w - - 0 1)

Erokhin, Vladimir Alekseevich

Sachove umeni (Ceskoslovensky sach), 1986

5Qbq/nnN1r3/R2bpN2/2k1p1Rp/P1p1B3/P3P3/1P1P3K/8

#2

12 + 11

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc7
      • 2.Rxe5#
    • 1...Rd7
      • 2.Sxd7#
      • 2.Rxe5#
    • 1...Rf7
      • 2.Sxe6#
      • 2.Rxe5#
    • 1...Rg7
      • 2.Rxe5#
    • 1...Rh7
      • 2.Rxe5#
    • 1...Re8
      • 2.Sd7#
      • 2.Rxe5#
    • 1...Bxc7
      • 2.Sd7#
    • 1...Sb5
      • 2.Rc6#
    • 1...Sc6
      • 2.Rxc6#
    • 1...Sc8
      • 2.Rc6#
  • Tries
    • 1.Sxe6+?
      • 1...Rxe6
        • 2.Sd7#
      • 1...Bxe6!
    • 1.b3?
      • threat
        • 2.b4#
      • 1...Sc6
        • 2.Rxc6#
      • 1...c3
        • 2.d4#
      • 1...cxb3!
    • 1.d3?
      • threat
        • 2.d4#
      • 1...Sb5
        • 2.Rc6#
      • 1...Sc6
        • 2.Rxc6#
      • 1...c3
        • 2.b4#
      • 1...cxd3!
  • Keys
    • 1.Qc8!
      • threat
        • 2.Sxe6#
      • 1...Rxc7
        • 2.Sd7#
      • 1...Bxc7
        • 2.Rxe5#
      • 1...Sxc8
        • 2.Rc6#
      • 1...Sc6
        • 2.Rxc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(i);P_SPINB(e),XS(K)::R(H),XP(c)
    • R(i);P_SPINB(e)::R(H),XP(c)
    • B(e);P_SPINR(i),XS(K)::S(J)
    • S(g);N_GUARD::R1(I)
    • S(g);N_GUARD::R1(I),XS(g)
  • Tries
    • Try
      • S(K);CHECK,XP(f)
      • Vars
        • R(i);P_SPINB(e),XS(K)::S(J)
      • Refutation
        • B(j);XS(K)
    • Try
      • P(A);
      • Threat
        • P(A)
      • Vars
        • S(g);N_GUARD::R1(I),XS(g)
        • P(a);N_GUARD::P(B)
      • Refutation
        • P(a);XP(A)
    • Try
      • P(B);
      • Threat
        • P(B)
      • Vars
        • S(g);N_GUARD::R1(I)
        • S(g);N_GUARD::R1(I),XS(g)
        • P(a);N_GUARD::P(A)
      • Refutation
        • P(a);XP(B)
  • Actual
    • Q(L);
    • Threat
      • QAR(L)+S(K),DCHECK,XP(f)
    • Vars
      • R(i);N_GUARD,P_SPINR(i),XS(K)::S(J)
      • B(e);N_GUARD,P_SPINB(e),XS(K)::R(H),XP(c)
      • S(g);N_GUARD,XQ(L)::R1(I)
      • S(g);N_GUARD::R1(I),XS(g)
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