MESON Chess Problem Database

Problem Display
PID: 220410 (Kn6/nQ6/2N1N1Rb/8/2PPkP2/4p2P/2R4P/7b w - - 0 1)

Kopaev, Viacheslav Georgievich

Freie Presse, 1990

Kn6/nQ6/2N1N1Rb/8/2PPkP2/4p2P/2R4P/7b

#2

11 + 6

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Sb4#
    • 1...Kf3
      • 2.Se5#
    • 1...Kf5
      • 2.Se7#
  • Tries
    • 1.Sc5+?
      • 1...Kxf4
        • 2.Qf7#
      • 1...Kf5
        • 2.Qf7#
      • 1...Kf3!
    • 1.Sg5+?
      • 1...Kd3
        • 2.Qb3#
      • 1...Kxf4
        • 2.Qf7#
      • 1...Kf5
        • 2.Qf7#
      • 1...Bxg5!
    • 1.Qh7?
      • threat
        • 2.Rg3#
      • 1...Kd3
        • 2.Rgg2#
      • 1...Kf3
        • 2.Rg3#
      • 1...Kf5
        • 2.Rxh6#
      • 1...Bg5!
  • Keys
    • 1.Qb1!
      • threat
        • 2.Rf2#
      • 1...Kd3
        • 2.Sc5#
      • 1...Kf3
        • 2.Qxh1#
      • 1...Kf5
        • 2.Rcg2#
      • 1...e2
        • 2.Rc3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(c);S_FLIGHT::S(G)
    • K(c);S_FLIGHT::QAB(J)+S(G),DCHECK
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(c);P-FLIGHT,XP(F)::QAR(J)
        • K(c);S_FLIGHT::QAR2(J)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • S(H);CHECK
      • Vars
        • K(c);S_FLIGHT::QAR2(J)
        • K(c);P-FLIGHT,XP(F)::QAR(J)
      • Refutation
        • B(d);XS(H)
    • Try
      • Q(J);
      • Threat
        • QAB(J)+R(I)
      • Vars
        • K(c);P_PINS(G),S_FLIGHT::QAB(J)+R(I)
        • K(c);S_FLIGHT::R1(I)
        • K(c);P_PINS(G),S_FLIGHT::QAB(J)+R(I),XB(d)
      • Refutation
        • B(d);
  • Actual
    • Q(J);
    • Threat
      • QAB(J)+R(A)
    • Vars
      • K(c);P_PINS(G),S_FLIGHT::S(H)
      • K(c);S_FLIGHT::QAB(J),XB(a)
      • K(c);P_PINS(G),S_FLIGHT::QAB(J)+R(A)
      • P(b);::QAB(J)+R(A)
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