MESON Chess Problem Database

Problem Display
PID: 216137 (4R1K1/p3pp1B/2b2Pn1/r1p2N1Q/2pPkP2/q1b3pN/2P5/2B5 w - - 0 1)

Udartsev, Valentin Filipovich

Probleemblad, 1980

4R1K1/p3pp1B/2b2Pn1/r1p2N1Q/2pPkP2/q1b3pN/2P5/2B5

#2

11 + 12

SOLUTION

  • SOUND
  • Sets
    • 1...Bxd4
      • 2.Sd6#
    • 1...cxd4
      • 2.Sxg3#
  • Tries
    • 1.Sg5+?
      • 1...Kd5
        • 2.Qf3#
      • 1...Kxf5!
    • 1.Sh4?
      • threat
        • 2.Qe5#
      • 1...Bxd4
        • 2.Qf5#
      • 1...cxd4
        • 2.Qf3#
      • 1...e5
        • 2.Qxe5#
      • 1...Kxd4!
    • 1.Rxe7+?
      • 1...Kd5
        • 2.Qf3#
      • 1...Se5
        • 2.Rxe5#
      • 1...Sxe7+!
  • Keys
    • 1.Sxe7!
      • threat
        • 2.Sxc6#
      • 1...Kxd4
        • 2.Sxc6#
      • 1...Bxd4
        • 2.Sg5#
      • 1...Bxe8
        • 2.Qd5#
      • 1...cxd4
        • 2.Qe2#
      • 1...Ba4
        • 2.Sc6#
        • 2.Qd5#
      • 1...Bb5
        • 2.Sc6#
        • 2.Qd5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Bb7
        • 2.Sc6#
      • 1...Bd7
        • 2.Qd5#
      • 1...Ba8
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 6
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK,XP(D)::S(F)
    • P(g);SBLOCK,XP(D)::S(F),XP(c)
  • Tries
    • Try
      • S(C);CHECK
      • Vars
        • K(e);N_SPINP(k),S_FLIGHT::QAB(G)
      • Refutation
        • K(e);N_SPINP(k),P_SPINS(i),S_FLIGHT,XS(F)
    • Try
      • S(F);P_PINS(i)
      • Threat
        • QAR1(G)
      • Vars
        • B(b);SBLOCK,XP(D)::QAB1(G)
        • P(g);SBLOCK,XP(D)::QAB1(G)
        • P(k);::QAR1(G),XP(k)
      • Refutation
        • K(e);N_SPINP(k),N_SPINS(i),P-FLIGHT,XP(D)
    • Try
      • R(J);CHECK,XP(k)
      • Vars
        • K(e);S_FLIGHT::QAB(G)
        • S(i);N_GUARD,P_SPINS(i)::R1(J),XS(i)
      • Refutation
        • S(i);CHECK,XR(J)
  • Actual
    • S(F);P_PINS(i),XP(k)
    • Threat
      • R(J)+S(F),XB(h)
    • Vars
      • K(e);N_SPINS(i),P-FLIGHT,XP(D)::S(F),XB(h)
      • B(b);SBLOCK,XP(D)::S(C)
      • B(h);N_GUARD,XR(J)::QAB1(G)
      • P(g);SBLOCK,XP(D)::QAR2(G)
      • B(h);N_GUARD::QAB1(G),XB(h)
      • B(h);::R(J)+S(F)
      • B(h);N_GUARD::QAB1(G)
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