MESON Chess Problem Database

Problem Display
PID: 276427 (4B3/r1p5/2ppk1p1/2pNbN2/7B/8/2Q3K1/3R4 w - - 0 1)

Soroka, Ivan Ivanovich

Zalokotsky, Roman Fedorovich (aka Fedorovich, Roman)

Mat, 1981

4B3/r1p5/2ppk1p1/2pNbN2/7B/8/2Q3K1/3R4

#2

7 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Sxc7#
    • 1...Ra2
      • 2.Sxc7#
    • 1...Ra3
      • 2.Sxc7#
    • 1...Ra4
      • 2.Sxc7#
    • 1...Ra5
      • 2.Sxc7#
    • 1...Ra6
      • 2.Sxc7#
    • 1...Ra8
      • 2.Sxc7#
  • Tries
    • 1.Re1?
      • threat
        • 2.Sf4#
      • 1...Kxd5
        • 2.Bf7#
      • 1...cxd5
        • 2.Sg7#
      • 1...Ra4
        • 2.Sxc7#
      • 1...g5!
    • 1.Qe4?
      • threat
        • 2.Sf4#
        • 2.Sg7#
      • 1...cxd5
        • 2.Sg7#
      • 1...gxf5
        • 2.Sf4#
      • 1...g5
        • 2.Sg7#
      • 1...Ra2+!
  • Keys
    • 1.Qe2!
      • threat
        • 2.Sg7#
      • 1...Kxf5
        • 2.Bd7#
      • 1...gxf5
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(g);N_GUARD::S(E),XP(h)
    • R(g);N_GUARD,P_PINQ(B)::S(E),XP(h)
  • Tries
    • Try
      • R(A);P_PINB(b)
      • Threat
        • S(E)
      • Vars
        • K(e);N_GUARD,N_SPINB(b),S_FLIGHT,XS(E)::B(G)
        • P(c);SBLOCK,XS(E)::S(F)
        • R(g);N_GUARD::S(E),XP(h)
      • Refutation
        • P(f);
    • Try
      • Q(B);P_PINB(b)
      • Threat
        • DUALS(2)
      • Vars
        • P(c);XS(E)::S(F)
        • P(f);XS(F)::S(E)
        • P(f);::S(F)
      • Refutation
        • R(g);CHECK
  • Actual
    • Q(B);P_PINB(b)
    • Threat
      • S(F)
    • Vars
      • K(e);N_GUARD,N_SPINB(b),S_FLIGHT,XS(F)::B(G)
      • P(f);SBLOCK,XS(F)::S(E)
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