MESON Chess Problem Database

Problem Display
PID: 53453 (B2bQ3/1q5p/3rPp2/p2n2p1/R1P1k1N1/2P4N/4P3/5RBK w - - 0 1)

Pape, Edouard

1st Prize, Match: France - Spain, 1937

B2bQ3/1q5p/3rPp2/p2n2p1/R1P1k1N1/2P4N/4P3/5RBK

#2

12 + 9

785 Het Belgisch Schaakbord (L'Echiquier Belge) 1949
1997 Ajedrez 1954

SOLUTION

  • SOUND
  • Sets
    • 1...Qc8
      • 2.c5#
    • 1...Qb5
      • 2.cxb5#
    • 1...Qa7
      • 2.c5#
    • 1...Qc7
      • 2.c5#
    • 1...Qe7
      • 2.cxd5#
      • 2.c5#
    • 1...Qf7
      • 2.cxd5#
      • 2.c5#
    • 1...Qg7
      • 2.cxd5#
      • 2.c5#
    • 1...Rxe6
      • 2.Qxe6#
  • Tries
    • 1.Bxb7?
      • threat
        • 2.cxd5#
        • 2.c5#
      • 1...Rb6
        • 2.Bxd5#
      • 1...Bb6
        • 2.c5#
      • 1...Rc6!
    • 1.Qg6+?
      • 1...f5
        • 2.Qxf5#
      • 1...hxg6!
    • 1.cxd5+?
      • 1...Kxd5
        • 2.Rd1#
        • 2.Rf5#
        • 2.e4#
      • 1...Qb4!
  • Keys
    • 1.Qb5!
      • threat
        • 2.cxd5#
      • 1...Qxb5
        • 2.cxb5#
      • 1...Sxc3
        • 2.Qf5#
      • 1...Qc6
        • 2.Qb1#
      • 1...Qc8
        • 2.Qb1#
        • 2.c5#
      • 1...Qb6
        • 2.c5#
      • 1...Qa7
        • 2.Qb1#
        • 2.c5#
      • 1...Qc7
        • 2.Qb1#
        • 2.c5#
      • 1...Rc6
        • 2.Qxd5#
      • 1...Bb6
        • 2.Qb1#
      • 1...Se3
        • 2.Sgf2#
      • 1...Sb4
        • 2.Qf5#
      • 1...Sf4
        • 2.Shf2#
      • 1...Sb6
        • 2.Qf5#
      • 1...Sc7
        • 2.Qf5#
      • 1...Se7
        • 2.Sxf6#

There are these versions: 109863

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 11
    • REMOVED MATES = 4
  • Sets
    • Q(g);N_GUARD,P_SPINS(c)::R(G)+P(H)
    • Q(g);OGATE,P_SPINS(c)::R(G)+P(H),XQ(g)
    • R(e);OGATE,P_SPINR(e),XP(J)::QAR2(L),XR(e)
  • Tries
    • Try
      • B(K);P_PINS(c),XQ(g)
      • Threat
        • DUALS(2)
      • Vars
        • R(e);N_GUARD::B(K),XS(c)
        • B(i);::R(G)+P(H)
      • Refutation
        • R(e);N_SPINS(c)
    • Try
      • Q(L);CHECK
      • Vars
        • P(f);P_SPINP(f)::QAB1(L),XP(f)
      • Refutation
        • P(h);XQ(L)
    • Try
      • P(H);CHECK,XS(c)
      • Refutation
        • Q(g);P_SPINQ(g)
  • Actual
    • Q(L);
    • Threat
      • R(G)+P(H),XS(c)
    • Vars
      • Q(g);OGATE,P_SPINS(c),XQ(L)::R(G)+P(H),XQ(g)
      • S(c);OGATE,P_SPINQ(g),XP(E)::QAB1(L)
      • Q(g);N_GUARD::QAB(L)
      • Q(g);P_SPINS(c)::R(G)+P(H)
      • R(e);N_GUARD,S_CUTQ(g)::QAB1(L),XS(c)
      • B(i);S_CUTQ(g)::QAB(L)
      • S(c);P_SPINQ(g),SBLOCK::S(I)
      • S(c);OGATE,P_SPINQ(g)::QAB1(L)
      • S(c);P_SPINQ(g),SBLOCK::S(F)
      • S(c);N_GUARD,P_SPINQ(g),S_CUTB(i)::S(I),XP(f)
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