MESON Chess Problem Database

Problem Display
PID: 72016 (8/B1KQP2P/3PP1p1/3krpq1/NPp5/PN1rp1P1/3P4/2RB4 w - - 0 1)

Erokhin, Vladimir Alekseevich

Szachy, 1985

8/B1KQP2P/3PP1p1/3krpq1/NPp5/PN1rp1P1/3P4/2RB4

#2

15 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Sc3#
    • 1...Rc3
      • 2.Sxc3#
    • 1...Rd4
      • 2.Sc3#
  • Tries
    • 1.Sd4?
      • threat
        • 2.Qc6#
      • 1...Ke4
        • 2.Bf3#
      • 1...Rxd4
        • 2.Sc3#
      • 1...Rxe6
        • 2.Qxe6#
      • 1...Re4
        • 2.Qb5#
      • 1...Qxe7!
    • 1.h8Q?
      • threat
        • 2.Qa8#
      • 1...Ke4
        • 2.Qh1#
      • 1...Rxe6
        • 2.Qc6#
      • 1...Re4
        • 2.Sb6#
      • 1...c3!
  • Keys
    • 1.Rxc4!
      • threat
        • 2.Sb6#
      • 1...Kxc4
        • 2.Sb6#
      • 1...Rxe6
        • 2.Qb5#
      • 1...Rd4
        • 2.Rxd4#
      • 1...Re4
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);N_GUARD,XP(C)::S(G)
    • R(a);N_GUARD::S(G),XR(a)
    • R(a);N_GUARD::S(G)
  • Tries
    • Try
      • S(E);
      • Threat
        • QAB1(M)
      • Vars
        • K(d);S_FLIGHT::B(B)
        • R(a);N_GUARD,XS(E)::S(G)
        • R(e);OGATE,XP(J)::QAB1(M),XR(e)
        • R(e);SBLOCK::QAR2(M)
      • Refutation
        • Q(g);P_PINQ(M),XP(N)
    • Try
      • P(O);
      • Threat
        • QAB(O)
      • Vars
        • K(d);S_FLIGHT::QAB(O)
        • R(e);SBLOCK,XP(J)::QAB1(M)
        • R(e);SBLOCK::S(G)
      • Refutation
        • P(c);
  • Actual
    • R(A);XP(c)
    • Threat
      • S(G)
    • Vars
      • K(d);S_FLIGHT,XR(A)::S(G)
      • R(e);SBLOCK,XP(J)::QAR2(M)
      • R(a);N_GUARD::R1(A),XR(a)
      • R(e);SBLOCK::R1(A)
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