MESON Chess Problem Database

Problem Display
PID: 18198 (1K6/3p1b2/N2p1P2/1pPkN1R1/1b1p3R/n6Q/P3PPqB/2rr4 w - - 0 1)

Fleck, Ferenc

1st Prize, Budapest Chess Association TT, 1954

1K6/3p1b2/N2p1P2/1pPkN1R1/1b1p3R/n6Q/P3PPqB/2rr4

#2

12 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rxc5
      • 2.Sxb4#
    • 1...Bxc5
      • 2.Sc7#
    • 1...Be6
      • 2.Qxg2#
    • 1...Sc2
      • 2.Qb3#
    • 1...dxc5
      • 2.Qxd7#
  • Tries
    • 1.Sd3+?
      • 1...Kc4
        • 2.Sb2#
      • 1...Kc6
        • 2.Sdxb4#
        • 2.Saxb4#
      • 1...Qxg5!
    • 1.Sc4+?
      • 1...Kxc4
        • 2.Qb3#
      • 1...Kc6
        • 2.Sxb4#
      • 1...Qxg5!
    • 1.Sc6+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kxc6
        • 2.Sxb4#
      • 1...Qxg5!
    • 1.Sg6+?
      • 1...Kc4
        • 2.Qb3#
      • 1...Kc6
        • 2.Sxb4#
        • 2.Se7#
      • 1...Qxg5!
    • 1.Sxd7+?
      • 1...Kc4
        • 2.Sb6#
        • 2.Qb3#
      • 1...Kc6
        • 2.Sxb4#
      • 1...Qxg5!
    • 1.Sxf7+?
      • 1...Kc4
        • 2.Sxd6#
        • 2.Qb3#
      • 1...Kc6
        • 2.Sxb4#
        • 2.Sd8#
      • 1...Qxg5!
    • 1.Qxd7?
      • threat
        • 2.Qxd6#
        • 2.Qxf7#
      • 1...Rxc5
        • 2.Sxb4#
        • 2.Qxf7#
      • 1...Bxc5
        • 2.Sc7#
        • 2.Qxf7#
      • 1...Qh3
        • 2.Qxd6#
      • 1...Bh5
        • 2.Qxd6#
      • 1...Be6
        • 2.Qc6#
        • 2.Qxd6#
        • 2.Qb7#
      • 1...Bg6
        • 2.Qxd6#
      • 1...Be8
        • 2.Qxd6#
      • 1...Bg8
        • 2.Qxd6#
      • 1...Sc4
        • 2.Qxf7#
      • 1...Qg4!
    • 1.Qf3+?
      • 1...Ke6
        • 2.Sc7#
      • 1...Qxf3!
  • Keys
    • 1.Sg4+!
      • 1...Kc4
        • 2.Qb3#
      • 1...Ke4
        • 2.Qxg2#
      • 1...Kc6
        • 2.Sxb4#
      • 1...Ke6
        • 2.Sc7#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 5
  • Sets
    • R(a);SBLOCK,XP(G)::S(J),XB(e)
    • B(e);SBLOCK,XP(G)::S(J)
    • B(k);SBLOCK::QAB(E),XQ(c)
    • S(d);N_GUARD,S_CUTR(a)::QAB(E)
    • P(i);OGATEB,XP(G)::QAR2(E),XP(j)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P_SPINP(f),S_FLIGHT::S(H)
      • Refutation
        • Q(c);XR(I)
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P_SPINP(f),S_FLIGHT,XS(H)::QAB1(E)
        • K(h);S_FLIGHT::S(J),XB(e)
      • Refutation
        • Q(c);XR(I)
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P_SPINP(f),S_FLIGHT::QAB1(E)
        • K(h);S_FLIGHT,XS(H)::S(J),XB(e)
      • Refutation
        • Q(c);XR(I)
    • Try
      • S(H);CHECK
      • Vars
        • K(h);P_SPINP(f),S_FLIGHT::QAB1(E)
      • Refutation
        • Q(c);XR(I)
    • Try
      • S(H);CHECK,XP(j)
      • Vars
        • K(h);S_FLIGHT::S(J),XB(e)
      • Refutation
        • Q(c);XR(I)
    • Try
      • S(H);CHECK,XB(k)
      • Refutation
        • Q(c);XR(I)
    • Try
      • Q(E);P_PINP(i),XP(j)
      • Threat
        • DUALS(2)
      • Vars
        • Q(c);::QAR1(E),XP(i)
        • B(k);::QAR1(E),XP(i)
        • S(d);::QAB(E),XB(k)
      • Refutation
        • Q(c);
    • Try
      • Q(E);CHECK
      • Vars
        • K(h);S_FLIGHT::S(J)
      • Refutation
        • Q(c);XQ(E)
  • Actual
    • S(H);CHECK
    • Vars
      • K(h);S_FLIGHT::QAB1(E)
      • K(h);S_FLIGHT::QAB(E),XQ(c)
      • K(h);S_FLIGHT::S(J),XB(e)
      • K(h);S_FLIGHT::S(J)
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