MESON Chess Problem Database

Problem Display
PID: 267324 (B3R1r1/5Rp1/3pp3/2pnbP2/2P1kpp1/1Np1N3/4PQ2/2B3K1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Schakend Nederland, 1979

B3R1r1/5Rp1/3pp3/2pnbP2/2P1kpp1/1Np1N3/4PQ2/2B3K1

#2

11 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...fxe3
      • 2.Qxe3#
    • 1...g3
      • 2.Qf3#
    • 1...exf5
      • 2.Bxd5#
  • Tries
    • 1.Sd2+?
      • 1...Kd4
        • 2.Sc2#
        • 2.Sxd5#
      • 1...cxd2!
    • 1.Sxd5?
      • threat
        • 2.Sxc3#
      • 1...exd5
        • 2.Bxd5#
        • 2.Qxf4#
      • 1...Bf6
        • 2.Qxf4#
      • 1...c2
        • 2.Sd2#
        • 2.Sc3#
      • 1...Bd4!
    • 1.fxe6?
      • threat
        • 2.Bxd5#
      • 1...Bd4
        • 2.Qxf4#
      • 1...Bf6!
  • Keys
    • 1.Sxg4!
      • threat
        • 2.Qf3#
      • 1...Bf6
        • 2.Qxf4#
      • 1...Bd4
        • 2.Bxd5#
      • 1...f3
        • 2.Qe3#
        • 2.Qxf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • P(c);OGATE,XS(F)::QAR1(D),XP(c)
    • P(d);N_GUARD::QAB1(D)
    • P(i);N_GUARD,P_SPINB(g),XP(H)::B(J),XS(f)
  • Tries
    • Try
      • S(E);CHECK
      • Refutation
        • P(a);XS(E)
    • Try
      • S(F);XS(f)
      • Threat
        • B(J)+S(F),DCHECK,XP(a)
      • Vars
        • B(g);N_GUARD,P_SPINP(i)::QAR1(D),XP(c)
      • Refutation
        • B(g);P_PINQ(D),P_SPINP(i)
    • Try
      • P(H);XP(i)
      • Threat
        • B(J),XS(f)
      • Vars
        • B(g);N_GUARD::QAR1(D),XP(c)
      • Refutation
        • B(g);
  • Actual
    • S(F);XP(d)
    • Threat
      • QAB1(D)
    • Vars
      • B(g);N_GUARD,P_SPINP(i)::QAR1(D),XP(c)
      • B(g);P_PINQ(D),P_SPINP(i)::B(J),XS(f)
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