MESON Chess Problem Database

Problem Display
PID: 157722 (2R2N2/8/1KR5/3p2n1/2NkP3/3p4/8/4Q1b1 w - - 0 1)

Erokhin, Vladimir Alekseevich

Chervoni Girnik, 1974

2R2N2/8/1KR5/3p2n1/2NkP3/3p4/8/4Q1b1

#2

7 + 5

15148 Sadier Collection 2016

SOLUTION

  • SOUND
  • Sets
    • 1...Sf3
      • 2.Se6#
    • 1...Sh3
      • 2.Se6#
    • 1...Sxe4
      • 2.Se6#
    • 1...Se6
      • 2.Sxe6#
    • 1...Sf7
      • 2.Se6#
    • 1...Sh7
      • 2.Se6#
    • 1...dxe4
      • 2.Rd6#
      • 2.Rd8#
  • Tries
    • 1.Re6?
      • threat
        • 2.Qa1#
      • 1...Sxe6
        • 2.Sxe6#
      • 1...dxc4
        • 2.Rd8#
      • 1...dxe4
        • 2.Rd6#
      • 1...d2
        • 2.Qxd2#
      • 1...Sxe4!
    • 1.Qxg1+?
      • 1...Kxe4
        • 2.Qg4#
      • 1...Kc3!
  • Keys
    • 1.Re8!
      • threat
        • 2.Qa1#
      • 1...Sxe4
        • 2.Se6#
      • 1...dxc4
        • 2.Rd6#
      • 1...dxe4
        • 2.Rd8#
      • 1...d2
        • 2.Qxd2#
      • 1...Se6
        • 2.Sxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • S(e);N_GUARD::S(G)
    • S(e);N_GUARD,XP(C)::S(G)
    • S(e);N_GUARD::S(G),XS(e)
  • Tries
    • Try
      • R(E);
      • Threat
        • QAB(A)
      • Vars
        • S(e);XR(E)::S(G),XS(e)
        • P(d);OGATEB,SBLOCK,XS(B)::R(F)
        • P(d);OGATEB,XP(C)::R(E)
        • P(b);OGATEB::QAR2(A),XP(b)
      • Refutation
        • S(e);XP(C)
    • Try
      • Q(A);CHECK,XB(a)
      • Vars
        • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(A)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(F);
    • Threat
      • QAB(A)
    • Vars
      • S(e);N_GUARD,XP(C)::S(G)
      • P(d);OGATEB,SBLOCK,XS(B)::R(E)
      • P(d);OGATEB,XP(C)::R(F)
      • P(b);OGATEB::QAR2(A),XP(b)
      • S(e);N_GUARD::S(G),XS(e)
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