MESON Chess Problem Database

Problem Display
PID: 176416 (B3QnnB/5K2/N4Ppp/5p2/3k1b1R/P2PN3/1Pp1P3/2r2r2 w - - 0 1)

Erokhin, Vladimir Alekseevich

Schach-Echo, 1983

B3QnnB/5K2/N4Ppp/5p2/3k1b1R/P2PN3/1Pp1P3/2r2r2

#2

12 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxc2#
    • 1...Rb1
      • 2.Sxc2#
    • 1...Rcd1
      • 2.Sxc2#
    • 1...Rce1
      • 2.Sxc2#
    • 1...Rfd1
      • 2.Rxf4#
    • 1...Rfe1
      • 2.Rxf4#
    • 1...Rg1
      • 2.Rxf4#
    • 1...Rh1
      • 2.Rxf4#
    • 1...Sxf6
      • 2.Bxf6#
    • 1...g5
      • 2.Sxf5#
  • Tries
    • 1.Sg4?
      • threat
        • 2.Qa4#
      • 1...fxg4
        • 2.Qe4#
      • 1...Bd2
        • 2.Qe5#
      • 1...Bd6
        • 2.Qe3#
      • 1...Sd7!
  • Keys
    • 1.Sc4!
      • threat
        • 2.Qe3#
        • 2.Qe5#
      • 1...Rf3
        • 2.Qe5#
      • 1...Se6
        • 2.Qd7#
      • 1...Sd7
        • 2.Qxd7#
        • 2.Qe3#
      • 1...Se7
        • 2.fxe7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • R(a);N_GUARD::S(E),XP(c)
    • R(b);N_GUARD::R(F),XB(e)
    • S(j);OGATE,P_SPINS(j),XP(H)::B(L),XS(j)
    • P(g);N_GUARD::S(E),XP(f)
  • Tries
    • Try
      • S(E);N_PINB(e)
      • Threat
        • QAR(K)
      • Vars
        • P(f);N_GUARD,XS(E)::QAR1(K)
        • B(e);N_GUARD::QAB1(K)
      • Refutation
        • S(i);
  • Actual
    • S(E);
    • Threat
      • DUALS(2)
    • Vars
      • R(b);::QAB1(K)
      • S(i);N_GUARD::QAR(K)
      • S(j);OGATE::B(L)+P(H),XS(j)
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