MESON Chess Problem Database

Problem Display
PID: 79861 (BQ5K/6PN/8/3npp1n/2Rqk1r1/7R/N2bPP2/5r2 w - - 0 1)

Ernst, Erich

Badische Neueste Nachrichten, 1994

BQ5K/6PN/8/3npp1n/2Rqk1r1/7R/N2bPP2/5r2

#2

10 + 9

6114 Problemschach-Jahrbuch (1994) 1995

SOLUTION

  • SOUND
  • Sets
    • 1...Kf4
      • 2.Rxd4#
    • 1...Rf4
      • 2.Sg5#
    • 1...Bf4
      • 2.Sc3#
    • 1...Sf4
      • 2.Sf6#
  • Tries
    • 1.Sc3+?
      • 1...Kf4
        • 2.Rf3#
        • 2.Rxd4#
      • 1...Bxc3!
    • 1.Bxd5+?
      • 1...Kf4
        • 2.Rf3#
        • 2.Rxd4#
      • 1...Kxd5!
    • 1.Re3+?
      • 1...Kf4
        • 2.Rxd4#
        • 2.Qxe5#
      • 1...Bxe3!
    • 1.Qb1+?
      • 1...Kf4
        • 2.Rf3#
      • 1...Rxb1!
  • Keys
    • 1.f4!
      • threat
        • 2.Qxe5#
      • 1...Kxf4
        • 2.Rxd4#
      • 1...Rfxf4
        • 2.Qb1#
      • 1...Rgxf4
        • 2.Sg5#
      • 1...Bxf4
        • 2.Sc3#
      • 1...Sxf4
        • 2.Sf6#
      • 1...exf4
        • 2.Qe8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • K(d);N_SPINS(f),P-FLIGHT,P_SPINP(g)::R(E),XQ(c)
    • R(e);N_GUARD,SBLOCK,S_CUTB(b)::S(G)
    • B(b);N_GUARD,SBLOCK::S(A)
    • S(i);N_GUARD,SBLOCK::S(G)
  • Tries
    • Try
      • S(A);CHECK
      • Refutation
        • B(b);XS(A)
    • Try
      • B(H);CHECK,XS(f)
      • Refutation
        • K(d);N_SPINQ(c),S_FLIGHT,XB(H)
    • Try
      • R(D);CHECK
      • Refutation
        • B(b);XR(D)
    • Try
      • Q(I);CHECK
      • Vars
        • K(d);N_SPINS(f),P-FLIGHT::R1(D)
      • Refutation
        • R(a);XQ(I)
  • Actual
    • P(C);
    • Threat
      • QAR1(I),XP(g)
    • Vars
      • K(d);N_SPINS(f),P-FLIGHT,P_SPINP(g),XP(C)::R(E),XQ(c)
      • R(a);N_GUARD,SBLOCK,XP(C)::QAB(I)
      • R(e);N_GUARD,SBLOCK,XP(C)::S(G)
      • B(b);N_GUARD,SBLOCK,XP(C)::S(A)
      • S(i);N_GUARD,SBLOCK,XP(C)::S(G)
      • P(g);OGATEB,P_PINP(F),SBLOCK,XP(C)::QAR(I)
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