MESON Chess Problem Database

Problem Display
PID: 12235 (rqr5/1B1N3p/2n1p2K/b2P4/RB1Nkn1R/1P6/2P2PP1/1Q6 w - - 0 1)

Abdurahmanovic, Fadil

The Problemist, 1976

rqr5/1B1N3p/2n1p2K/b2P4/RB1Nkn1R/1P6/2P2PP1/1Q6

#2

13 + 9

3771 FIDE Album (1974-1976) 1980
6490 yacpdb 2009
56 The Problemist 2012
15148 Sadier Collection 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Sa7
      • 2.c3#
    • 1...Se7
      • 2.c3#
    • 1...Sd8
      • 2.c3#
    • 1...exd5
      • 2.c3#
  • Tries
    • 1.Sf6+?
      • 1...Kxd4
        • 2.Qa1#
        • 2.Qb2#
      • 1...Ke5!
    • 1.Bc5?
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.c4#
      • 1...Sxd4
        • 2.c3#
      • 1...Sb4
        • 2.Qe1#
      • 1...Se5
        • 2.Sf6#
      • 1...Bc3!
  • Keys
    • 1.Se2!
      • threat
        • 2.c4#
      • 1...Kxd5
        • 2.c4#
      • 1...Kf5
        • 2.Sg3#
      • 1...Sxb4
        • 2.c3#
      • 1...Sd4
        • 2.Sg3#
      • 1...Se5
        • 2.Rxf4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 4
  • Sets
    • S(d);::QAB(A)+P(B)
    • P(e);SBLOCK,XP(J)::QAB(A)+P(B)
  • Tries
    • Try
      • S(M);CHECK
      • Refutation
        • K(a);N_SPINS(b),P-FLIGHT
    • Try
      • B(G);
      • Threat
        • QAB(A)+P(B)
      • Vars
        • K(a);N_SPINS(b),P_SPINS(d),S_FLIGHT,XP(J)::P(B)
        • S(d);N_SPINS(b),P_SPINS(d),XS(H)::QAB(A)+P(B)
        • S(d);S_CUTB(c)::QAR(A)
        • S(d);SBLOCK::S(M)
      • Refutation
        • B(c);
  • Actual
    • S(H);
    • Threat
      • QAB(A)+P(B)
    • Vars
      • K(a);N_SPINS(b),P_SPINS(d),S_FLIGHT,XP(J)::P(B)
      • K(a);N_SPINS(b),S_FLIGHT::S(H)
      • S(d);N_SPINS(b),P_SPINS(d),XB(G)::QAB(A)+P(B)
      • S(d);SBLOCK::S(H)
      • S(d);S_CUTQ(h)::R1(I),XS(b)
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