MESON Chess Problem Database

Problem Display
PID: 67454 (2R3K1/r3R3/1p1N1p2/1P1k1P2/3PNP2/3nb3/b3Q3/B7 w - - 0 1)

Burmistrov, Sergey Gennadevich

Permyakov, Evgeni Nikolaevich

Schach-Echo, 1982

2R3K1/r3R3/1p1N1p2/1P1k1P2/3PNP2/3nb3/b3Q3/B7

#2

11 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rb7
      • 2.Qxa2#
    • 1...Rd7
      • 2.Qxa2#
    • 1...Rxe7
      • 2.Qxa2#
  • Tries
    • 1.Rd7?
      • threat
        • 2.Sxf6#
      • 1...Rxd7
        • 2.Qxa2#
      • 1...Bxd4
        • 2.Sb7#
      • 1...Sb2!
    • 1.Rd8?
      • threat
        • 2.Sxf6#
      • 1...Sb2
        • 2.Sb7#
      • 1...Rd7
        • 2.Qxa2#
      • 1...Bxd4!
  • Keys
    • 1.Sb7!
      • threat
        • 2.Sxf6#
      • 1...Rxb7
        • 2.Qxa2#
      • 1...Bxd4
        • 2.Rd7#
      • 1...Sb2
        • 2.Rd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • R(g);N_GUARD::QAB(B),XB(a)
    • R(g);N_GUARD,XR(I)::QAB(B),XB(a)
  • Tries
    • Try
      • R(I);
      • Threat
        • S(D),XP(f)
      • Vars
        • R(g);N_GUARD,XR(I)::QAB(B),XB(a)
        • B(c);XP(C)::R(I)+S(H)
      • Refutation
        • S(b);
    • Try
      • R(J);
      • Threat
        • S(D),XP(f)
      • Vars
        • S(b);::R(J)+S(H)
        • R(g);N_GUARD::QAB(B),XB(a)
      • Refutation
        • B(c);XP(C)
  • Actual
    • S(H);
    • Threat
      • S(D),XP(f)
    • Vars
      • R(g);N_GUARD,XS(H)::QAB(B),XB(a)
      • B(c);XP(C)::R(I)
      • S(b);::R(J)
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