MESON Chess Problem Database

Problem Display
PID: 106220 (1N1n4/6Q1/3N1P2/R1PrP3/2pk1p2/1P1p4/1P1K4/7B w - - 0 1)

Kopaev, Viacheslav Georgievich

Praca, 1995

1N1n4/6Q1/3N1P2/R1PrP3/2pk1p2/1P1p4/1P1K4/7B

#2

11 + 6

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sc6
      • 2.Sxc6#
    • 1...Se6
      • 2.Sc6#
    • 1...Sb7
      • 2.Sc6#
    • 1...Sf7
      • 2.Sc6#
  • Tries
    • 1.Sxc4?
      • threat
        • 2.Qg1#
      • 1...f3
        • 2.Qg4#
      • 1...Rxe5!
    • 1.Qg5?
      • threat
        • 2.Qxf4#
      • 1...c3+
        • 2.bxc3#
      • 1...Se6
        • 2.Sc6#
      • 1...f3
        • 2.Qe3#
        • 2.Qf4#
      • 1...Rxe5!
  • Keys
    • 1.Sd7!
      • threat
        • 2.Sb5#
        • 2.Sf5#
        • 2.Qg1#
      • 1...c3+
        • 2.bxc3#
      • 1...Rxc5
        • 2.Sf5#
        • 2.Qg1#
      • 1...Rxe5
        • 2.Sb5#
      • 1...Rxd6
        • 2.Qg1#
      • 1...cxb3
        • 2.Ra4#
        • 2.Qg1#
      • 1...f3
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 4
  • Sets
    • S(f);N_GUARD::S(K),XS(f)
    • S(f);N_GUARD::S(K)
  • Tries
    • Try
      • S(H);XP(b)
      • Threat
        • QAB(J)
      • Vars
        • P(d);OGATEB::QAR(J)
      • Refutation
        • R(e);XP(G)
    • Try
      • Q(J);
      • Threat
        • QAR2(J),XP(d)
      • Vars
        • P(b);CHECK,OGATE::P(B),XP(b)
        • S(f);N_GUARD::S(K)
      • Refutation
        • R(e);XP(G)
  • Actual
    • S(K);
    • Threat
      • DUALS(3)
    • Vars
      • P(b);CHECK,OGATE::P(B),XP(b)
      • R(e);XP(G)::S(H)
      • R(e);XS(H)::QAB(J)
      • P(d);OGATEB::QAR(J)
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