MESON Chess Problem Database

Problem Display
PID: 198515 (7q/p2r2p1/1b4n1/1BPk2pR/K3N1Q1/1Pr5/1BN5/8 w - - 0 1)

Joseph, Fernand

2nd HM., Gevers MT, 1983

7q/p2r2p1/1b4n1/1BPk2pR/K3N1Q1/1Pr5/1BN5/8

#2

9 + 9

5110 Bekroonde Problemen 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Ke5
      • 2.Rxg5#
    • 1...Rd3
      • 2.Sb4#
    • 1...Re3
      • 2.Sxe3#
      • 2.Sb4#
    • 1...Rf3
      • 2.Sb4#
    • 1...Rg3
      • 2.Sb4#
    • 1...Rh3
      • 2.Sb4#
    • 1...Rc4+
      • 2.bxc4#
    • 1...Rxc5
      • 2.Se3#
      • 2.Sb4#
    • 1...Sf4
      • 2.Qf5#
    • 1...Sf8
      • 2.Rxg5#
      • 2.Qf5#
  • Tries
    • 1.Sxc3+?
      • 1...Kxc5
        • 2.Ba3#
        • 2.Qb4#
      • 1...Ke5!
    • 1.Bxc3?
      • threat
        • 2.Se3#
        • 2.Sb4#
      • 1...Sf4
        • 2.Qf5#
      • 1...Ba5
        • 2.Se3#
      • 1...a5
        • 2.Se3#
      • 1...Bxc5!
    • 1.Bc6+?
      • 1...Ke5
        • 2.Rxg5#
      • 1...Kxc6!
    • 1.Qxg5+?
      • 1...Kxe4
        • 2.Qf5#
      • 1...Se5
        • 2.Qxe5#
      • 1...Ke6!
  • Keys
    • 1.Sxg5!
      • threat
        • 2.Qd4#
      • 1...Rc4+
        • 2.Qxc4#
      • 1...Kxc5
        • 2.Se4#
      • 1...Ke5
        • 2.Sh7#
      • 1...Bxc5
        • 2.Qe6#
      • 1...Rd3
        • 2.Qc4#
      • 1...Sf4
        • 2.Qf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 3
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(b);P-FLIGHT,P_SPINR(a)::R(I),XP(c)
    • R(a);::S(B)
    • R(a);CHECK,OGATE::P(C),XR(a)
    • S(e);N_GUARD::QAR2(F)
  • Tries
    • Try
      • S(E);CHECK,XR(a)
      • Refutation
        • K(b);P-FLIGHT
    • Try
      • B(A);XR(a)
      • Threat
        • DUALS(2)
      • Vars
        • S(e);N_GUARD::QAR2(F)
        • B(d);::S(B)
        • P(f);::S(B)
      • Refutation
        • B(d);XP(H)
    • Try
      • B(G);CHECK
      • Vars
        • K(b);P-FLIGHT,P_SPINR(a)::R(I),XP(c)
      • Refutation
        • K(b);N_SPINP(c),S_FLIGHT,XB(G)
    • Try
      • Q(F);CHECK,XP(c)
      • Vars
        • K(b);S_FLIGHT,XS(E)::QAB1(F)
        • S(e);N_GUARD,P_SPINS(e)::QAR1(F),XS(e)
      • Refutation
        • K(b);S_FLIGHT
  • Actual
    • S(E);XP(c)
    • Threat
      • QAR1(F)
    • Vars
      • R(a);CHECK,N_GUARD::QAB1(F),XR(a)
      • K(b);P-FLIGHT,XP(H)::R(I)+S(E),DCHECK
      • K(b);P-FLIGHT,P_SPINR(a)::R(I)+S(E)
      • B(d);SBLOCK,XP(H)::QAB1(F)
      • R(a);N_GUARD::QAB1(F)
      • S(e);N_GUARD::QAR2(F)
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