MESON Chess Problem Database

Problem Display
PID: 152277 (1br5/R1p2p2/p4R1r/n3k2p/4P2B/K1P2P2/3N1q2/1Q6 w - - 0 1)

Desanges, L

Hampstead and Highgate Express, 1898

(First published on Sat Apr 23 1898)

1br5/R1p2p2/p4R1r/n3k2p/4P2B/K1P2P2/3N1q2/1Q6

#2

9 + 10

14867 BCPS Library 2014

SOLUTION

  • SOUND
  • Sets
    • 1...Qe1
      • 2.f4#
    • 1...Qg1
      • 2.f4#
    • 1...Qd4
      • 2.f4#
    • 1...Qb6
      • 2.f4#
    • 1...Qxa7
      • 2.f4#
    • 1...Qe2
      • 2.f4#
    • 1...Qg2
      • 2.f4#
    • 1...Qxf3
      • 2.Sxf3#
    • 1...Sb3
      • 2.Sc4#
    • 1...Sc4+
      • 2.Sxc4#
    • 1...Sc6
      • 2.Sc4#
    • 1...Sb7
      • 2.Sc4#
    • 1...c5
      • 2.Re7#
    • 1...c6
      • 2.Re7#
  • Tries
    • 1.Qb5+?
      • 1...Qc5+
        • 2.Qxc5#
      • 1...c5
        • 2.Re7#
      • 1...axb5!
  • Keys
    • 1.Qb6!
      • threat
        • 2.Rf5#
      • 1...Qc5+
        • 2.Qxc5#
      • 1...Sc4+
        • 2.Sxc4#
      • 1...Qxb6
        • 2.f4#
      • 1...Qxf3
        • 2.Qd4#
        • 2.Qc5#
      • 1...Rxf6
        • 2.Qxf6#
      • 1...cxb6
        • 2.Re7#
      • 1...Sc6
        • 2.Sc4#
      • 1...c6
        • 2.Re7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD::P(E)
    • Q(a);N_GUARD,XR(I)::P(E)
    • Q(a);P_PINP(D),XP(E)::S(B),XQ(a)
    • S(b);N_GUARD::S(B)
    • S(b);CHECK,N_GUARD::S(B),XS(b)
    • P(g);OGATE::R(I)
  • Tries
    • Try
      • Q(A);CHECK
      • Vars
        • Q(a);CHECK,N_GUARD,P_SPINQ(a)::QAR2(A),XQ(a)
        • P(g);OGATE,P_SPINP(g)::R(I)
      • Refutation
        • P(e);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • R1(H)
    • Vars
      • Q(a);CHECK,N_GUARD::QAR2(A),XQ(a)
      • S(b);CHECK,N_GUARD::S(B),XS(b)
      • Q(a);N_GUARD,XQ(A)::P(E)
      • R(f);OGATE,XR(H)::QAB1(A),XR(f)
      • P(g);OGATE,XQ(A)::R(I)
      • S(b);N_GUARD::S(B)
      • P(g);OGATE::R(I)
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