MESON Chess Problem Database

Problem Display
PID: 53222 (Bk5K/3P1pPp/2Pq3r/Q2Nr3/3b4/6B1/8/8 w - - 0 1)

Fleck, Ferenc

3rd Prize, BCF, 1950

Bk5K/3P1pPp/2Pq3r/Q2Nr3/3b4/6B1/8/8

#2

8 + 7

268 Chess Life 1954

SOLUTION

  • SOUND
  • Sets
    • 1...Qa3
      • 2.c7#
      • 2.d8Q#
      • 2.d8R#
    • 1...Qb4
      • 2.c7#
      • 2.d8Q#
      • 2.d8R#
    • 1...Qc5
      • 2.d8Q#
      • 2.d8R#
    • 1...Qe7
      • 2.c7#
    • 1...Qf8+
      • 2.gxf8Q#
      • 2.gxf8R#
    • 1...Qxd5
      • 2.c7#
      • 2.g8Q#
      • 2.g8R#
    • 1...Qe6
      • 2.c7#
    • 1...Qf6
      • 2.c7#
    • 1...Qg6
      • 2.c7#
      • 2.d8Q#
      • 2.d8R#
    • 1...Re1
      • 2.d8Q#
      • 2.d8R#
    • 1...Re2
      • 2.d8Q#
      • 2.d8R#
    • 1...Re3
      • 2.d8Q#
      • 2.d8R#
    • 1...Re4
      • 2.d8Q#
      • 2.d8R#
    • 1...Rxd5
      • 2.d8Q#
      • 2.d8R#
    • 1...Rf5
      • 2.d8Q#
      • 2.d8R#
    • 1...Rg5
      • 2.d8Q#
      • 2.d8R#
    • 1...Reh5
      • 2.d8Q#
      • 2.d8R#
    • 1...Ree6
      • 2.d8Q#
      • 2.d8R#
    • 1...Re7
      • 2.d8Q#
      • 2.d8R#
    • 1...Re8+
      • 2.dxe8Q#
      • 2.dxe8R#
    • 1...Ba7
      • 2.Qd8#
  • Tries
    • 1.Qb6+?
      • 1...Kxa8
        • 2.Qb7#
      • 1...Bxb6!
    • 1.Qc7+?
      • 1...Kxa8
        • 2.Qb7#
      • 1...Qxc7!
    • 1.Qb5+?
      • 1...Ka7
        • 2.Qb7#
      • 1...Kxa8
        • 2.Qb7#
      • 1...Bb6!
    • 1.g8Q+?
      • 1...Qf8
        • 2.Qxf8#
        • 2.c7#
      • 1...Re8+!
    • 1.g8R+?
      • 1...Qf8
        • 2.Rxf8#
        • 2.c7#
      • 1...Re8+!
  • Keys
    • 1.Bb7!
      • threat
        • 2.Qa8#
      • 1...Qf8+
        • 2.gxf8Q#
        • 2.gxf8R#
      • 1...Re8+
        • 2.dxe8Q#
        • 2.dxe8R#
      • 1...Qxd5
        • 2.g8Q#
        • 2.g8R#
      • 1...Rxd5
        • 2.d8Q#
        • 2.d8R#
      • 1...Qa3
        • 2.d8Q#
        • 2.d8R#
      • 1...Ba7
        • 2.Qd8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • Q(c);N_GUARD,P_SPINR(b)::P=Q
    • Q(c);N_GUARD,P_SPINR(b)::P(D)
    • Q(c);CHECK,OGATE,P_SPINR(b)::PXQ(c)=Q
    • Q(c);N_GUARD,P_PINP(F),P_SPINR(b)::P(D)
    • R(b);P_PINP(F),P_SPINQ(c)::P=Q
    • R(b);P_PINP(F),P_SPINQ(c),XS(C)::P=Q
    • R(b);CHECK,OGATE,P_PINP(F),P_SPINQ(c)::PXR(b)=Q
    • B(a);SBLOCK::QAR2(B)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XB(G)::QAB1(B)
      • Refutation
        • B(a);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);P-FLIGHT,XB(G)::QAB1(B)
      • Refutation
        • Q(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • K(g);S_FLIGHT::QAR1(B)
        • K(g);P-FLIGHT,XB(G)::QAB1(B)
      • Refutation
        • B(a);P_SPINB(a)
    • Try
      • P(F);CHECK
      • Refutation
        • R(b);CHECK,P_PINQ(F),P_SPINQ(c),P_SPINR(b)
    • Try
      • P(F);CHECK
      • Refutation
        • R(b);CHECK,P_PINR(F),P_SPINQ(c),P_SPINR(b)
  • Actual
    • B(G);
    • Threat
      • QAR1(B)
    • Vars
      • Q(c);CHECK,OGATE,P_SPINR(b)::PXQ(c)=Q
      • R(b);CHECK,OGATE,P_PINP(F),P_SPINQ(c)::PXR(b)=Q
      • Q(c);N_GUARD,P_SPINR(b),XS(C)::P=Q
      • R(b);P_PINP(F),P_SPINQ(c),XS(C)::P=Q
      • Q(c);N_GUARD,P_SPINR(b)::P=Q
      • B(a);SBLOCK::QAR2(B)
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