MESON Chess Problem Database

Problem Display
PID: 78566 (4Q3/5n2/6br/p2pq1n1/P2kN3/1B3R2/2PP3B/1K6 w - - 0 1)

Casa, Alex

1st Prize, Nice-Matin, 1970

4Q3/5n2/6br/p2pq1n1/P2kN3/1B3R2/2PP3B/1K6

#2

9 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Kxe4
      • 2.Rf4#
    • 1...Qxh2
      • 2.Rd3#
      • 2.c3#
    • 1...Qg3
      • 2.c3#
    • 1...Qf4
      • 2.Rd3#
      • 2.c3#
    • 1...Qd6
      • 2.Bg1#
      • 2.Rd3#
      • 2.c3#
    • 1...Qf6
      • 2.Bg1#
      • 2.Rd3#
      • 2.c3#
    • 1...Qc7
      • 2.Bg1#
      • 2.Rd3#
    • 1...Qg7
      • 2.Bg1#
      • 2.Rd3#
      • 2.c3#
    • 1...Qb8
      • 2.Bg1#
      • 2.Rd3#
      • 2.c3#
    • 1...Qh8
      • 2.Bg1#
      • 2.Rd3#
      • 2.c3#
    • 1...Qf5
      • 2.Bg1#
      • 2.Rd3#
      • 2.c3#
    • 1...Bxe4
      • 2.Bg1#
    • 1...Sd6
      • 2.Qxe5#
    • 1...Sd8
      • 2.Qxe5#
    • 1...Sh8
      • 2.Qxe5#
  • Tries
    • 1.Bxe5+?
      • 1...Kxe4
        • 2.Rf4#
      • 1...Sxe5!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qd3#
      • 1...Kxe4
        • 2.Qd3#
      • 1...Qxh2
        • 2.Qxd5#
      • 1...Qxe4
        • 2.Qb6#
      • 1...Bxe4
        • 2.Bg1#
      • 1...Sxe4
        • 2.Rd3#
      • 1...dxe4
        • 2.Qc4#
        • 2.c3#
      • 1...Qg3
        • 2.Qxd5#
      • 1...Qf4
        • 2.Qxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 3
  • Sets
    • K(a);OGATEB,P-FLIGHT,P_SPINQ(d),XS(H)::R1(F)
    • Q(d);::P(B)
    • B(f);P_PINP(B),SBLOCK,XS(H)::B(D)
    • S(h);N_GUARD::QAB1(I),XQ(d)
  • Tries
    • Try
      • B(D);CHECK,XQ(d)
      • Vars
        • K(a);P-FLIGHT,XS(H)::R1(F)
      • Refutation
        • S(h);XB(D)
  • Actual
    • Q(I);
    • Threat
      • QAR1(I)
    • Vars
      • K(a);P-FLIGHT,XS(H)::QAB1(I)
      • Q(d);N_GUARD,XB(D)::QAR1(I),XP(c)
      • Q(d);P_PINP(B),SBLOCK,XS(H)::QAB(I)
      • B(f);P_PINP(B),SBLOCK,XS(H)::B(D)
      • S(e);SBLOCK,XS(H)::R1(F)
      • Q(d);N_GUARD::QAR1(I),XP(c)
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