MESON Chess Problem Database

Problem Display
PID: 40889 (8/p1r1pK2/4p1pP/1p2p1Rq/N1knQPb1/5P2/P1N1P3/1rRn4 w - - 0 1)

Servais, Albert

2nd Prize, Bulletin de l'UPF, 1955

8/p1r1pK2/4p1pP/1p2p1Rq/N1knQPb1/5P2/P1N1P3/1rRn4

#2

11 + 13

3105 FIDE Album (1945-1955) 1964

SOLUTION

  • SOUND
  • Sets
    • 1...Rb4
      • 2.Sa3#
      • 2.Se3#
    • 1...b4
      • 2.Sa3#
    • 1...exf4
      • 2.Qd3#
      • 2.Qxd4#
  • Tries
    • 1.Sxd4+?
      • 1...Rxc1
        • 2.Sc2#
        • 2.Sb3#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Sxe6#
      • 1...Sc3
        • 2.Sb3#
        • 2.Sf5#
        • 2.Sc6#
        • 2.Sxe6#
      • 1...Kb4!
  • Keys
    • 1.Qxe5!
      • threat
        • 2.Qxd4#
      • 1...Sxc2
        • 2.Qe4#
      • 1...Sxe2
        • 2.Qxe2#
      • 1...Sxf3
        • 2.Qxc7#
      • 1...Rd7
        • 2.Qc5#
      • 1...Sb3
        • 2.Qxb5#
      • 1...Sf5
        • 2.Qxe6#
      • 1...Sc6
        • 2.Qc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 1
  • Sets
    • P(f);SBLOCK::R(A)+S(C),DCHECK
  • Tries
    • Try
      • S(C);CHECK,XS(d)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • Q(G);N_PINS(d),XP(g)
    • Threat
      • QAR1(G),XS(d)
    • Vars
      • S(d);OGATEB,P_SPINS(d),XS(C)::QAR2(G)
      • S(d);OGATE,XP(D)::QAB(G),XS(d)
      • S(d);N_GUARD,XP(E)::QAR(G),XR(l)
      • R(l);N_GUARD::QAR1(G)
      • S(d);N_GUARD,S_CUTR(a)::QAB1(G),XP(f)
      • S(d);N_GUARD,S_CUTB(e)::QAB(G),XP(i)
      • S(d);S_CUTR(l)::QAR1(G)
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