MESON Chess Problem Database

Problem Display
PID: 239823 (1K2Q1B1/7N/8/3pPnRp/4bk1p/n2p3P/5NP1/4R1B1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Themes-64, 1984

1K2Q1B1/7N/8/3pPnRp/4bk1p/n2p3P/5NP1/4R1B1

#2

11 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bf3
      • 2.Sxd3#
    • 1...Se3
      • 2.Bh2#
    • 1...Sd4
      • 2.Bh2#
    • 1...Sd6
      • 2.Bh2#
    • 1...Sh6
      • 2.Bh2#
    • 1...Se7
      • 2.Bh2#
    • 1...Sg7
      • 2.Bh2#
    • 1...d4
      • 2.Rxe4#
  • Tries
    • 1.Bxd5?
      • threat
        • 2.Rxe4#
      • 1...Bxg2
        • 2.Sxd3#
      • 1...Bxd5
        • 2.Sxd3#
      • 1...Bf3
        • 2.Sxd3#
      • 1...Se3
        • 2.Bh2#
      • 1...Sd6
        • 2.Bh2#
      • 1...Sg3!
    • 1.Rxf5+?
      • 1...Kg3
        • 2.Qg6#
      • 1...Bxf5
        • 2.Bh2#
      • 1...Kxf5!
    • 1.Qa4?
      • threat
        • 2.Sxd3#
      • 1...Kxe5
        • 2.Bh2#
      • 1...Sd4
        • 2.Bh2#
      • 1...d2
        • 2.Sd3#
      • 1...d4
        • 2.Rxe4#
      • 1...Sc4!
    • 1.Qf7?
      • threat
        • 2.Bh2#
      • 1...Bxg2
        • 2.Qxf5#
      • 1...Kxe5!
  • Keys
    • 1.Qf8!
      • threat
        • 2.Bh2#
      • 1...Kxe5
        • 2.Sxd3#
      • 1...Bxg2
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 8
  • Sets
    • B(c);N_GUARD::S(C),XP(b)
    • S(g);N_GUARD::B(B)
    • P(f);N_GUARD::R1(A),XB(c)
  • Tries
    • Try
      • B(K);XP(f)
      • Threat
        • R1(A),XB(c)
      • Vars
        • B(c);N_GUARD,XP(D)::S(C),XP(b)
        • B(c);N_GUARD,XB(K)::S(C),XP(b)
        • B(c);N_GUARD::S(C),XP(b)
        • S(g);N_GUARD::B(B)
      • Refutation
        • S(g);
    • Try
      • R(G);CHECK,XS(g)
      • Vars
        • K(d);S_FLIGHT::QAR(J)
        • B(c);SBLOCK,XR(G)::B(B)
      • Refutation
        • K(d);P-FLIGHT,XR(G)
    • Try
      • Q(J);P_PINB(c)
      • Threat
        • S(C),XP(b)
      • Vars
        • K(d);P_SPINS(g),S_FLIGHT,XP(F)::B(B)
        • S(g);N_GUARD,N_SPINB(c)::B(B)
        • P(b);::S(C)
        • P(f);N_GUARD,N_SPINB(c)::R1(A),XB(c)
      • Refutation
        • S(a);N_SPINB(c)
    • Try
      • Q(J);P_PINS(g)
      • Threat
        • B(B)
      • Vars
        • B(c);N_GUARD,XP(D)::QAR1(J),XS(g)
      • Refutation
        • K(d);P_SPINB(c),S_FLIGHT,XP(F)
  • Actual
    • Q(J);P_PINS(g)
    • Threat
      • B(B)
    • Vars
      • K(d);P_SPINB(c),S_FLIGHT,XP(F)::S(C),XP(b)
      • B(c);N_GUARD,XP(D)::QAR1(J),XS(g)
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