MESON Chess Problem Database

Problem Display
PID: 141286 (8/4b3/3p4/8/3pp1r1/B1PPk1P1/Q2R2P1/4K3 w - - 0 1)

Erokhin, Vladimir Alekseevich

Phenix, 1989

8/4b3/3p4/8/3pp1r1/B1PPk1P1/Q2R2P1/4K3

#2

8 + 6

SOLUTION

  • SOUND
  • Tries
    • 1.Rd1?
      • threat
        • 2.Bc1#
        • 2.Qd2#
        • 2.Qe2#
        • 2.Qf2#
      • 1...Rxg3
        • 2.Bc1#
        • 2.Qd2#
        • 2.Qf2#
      • 1...dxc3
        • 2.Qf2#
      • 1...Rf4
        • 2.Bc1#
        • 2.Qd2#
        • 2.Qe2#
      • 1...exd3!
    • 1.Qb1?
      • threat
        • 2.Re2#
      • 1...dxc3
        • 2.Qb6#
      • 1...exd3
        • 2.Qxd3#
      • 1...Rxg3!
    • 1.Qc4?
      • threat
        • 2.Re2#
        • 2.Qxd4#
      • 1...dxc3
        • 2.Re2#
      • 1...exd3
        • 2.Qxd3#
      • 1...Bf6
        • 2.Re2#
      • 1...Rxg3!
    • 1.Qd5?
      • threat
        • 2.Qxd4#
      • 1...Rxg3
        • 2.Qxe4#
      • 1...dxc3
        • 2.Re2#
      • 1...exd3
        • 2.Qf3#
      • 1...Bf6!
    • 1.Qf7?
      • threat
        • 2.Qf2#
      • 1...exd3
        • 2.Qf3#
      • 1...Rf4
        • 2.Qxf4#
      • 1...Bf6!
  • Keys
    • 1.Bc1!
      • threat
        • 2.Rd1#
      • 1...dxc3
        • 2.Qa7#
      • 1...exd3
        • 2.Re2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(C);
      • Threat
        • DUALS(4)
      • Vars
        • P(b);XP(F)::QAB1(B)
      • Refutation
        • P(c);XP(G)
    • Try
      • Q(B);
      • Threat
        • R1(C)
      • Vars
        • P(b);OGATEB,XP(F)::QAB(B)
        • P(c);OGATE,XP(G)::QAR1(B),XP(c)
      • Refutation
        • R(d);XP(H)
    • Try
      • Q(B);
      • Threat
        • DUALS(2)
      • Vars
        • P(b);XP(F)::R1(C)
        • P(c);OGATE,XP(G)::QAR1(B),XP(c)
        • B(f);::R1(C)
      • Refutation
        • R(d);XP(H)
    • Try
      • Q(B);
      • Threat
        • QAB1(B),XP(b)
      • Vars
        • R(d);N_GUARD,XP(H)::QAR1(B),XP(c)
        • P(b);XP(F)::R1(C)
        • P(c);OGATE,XP(G)::QAR1(B)
      • Refutation
        • B(f);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(c);N_GUARD,XP(G)::QAR1(B)
        • R(d);N_GUARD::QAB1(B),XR(d)
      • Refutation
        • B(f);
  • Actual
    • B(E);
    • Threat
      • B(E)+R(C)
    • Vars
      • P(b);OGATEB,XP(F)::QAB(B)
      • P(c);SBLOCK,XP(G)::B(E)+R(C),DCHECK
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