MESON Chess Problem Database

Problem Display
PID: 108381 (5Q2/6K1/4N3/2p1k1N1/2r5/8/3n1P2/8 w - - 0 1)

van Heycop ten Ham, AJCE

Montreal Gazette, 1895

5Q2/6K1/4N3/2p1k1N1/2r5/8/3n1P2/8

#2

5 + 4

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Ra4
      • 2.Qxc5#
    • 1...Rb4
      • 2.Qxc5#
    • 1...Re4
      • 2.Qxc5#
    • 1...Rf4
      • 2.Qxc5#
    • 1...Rg4
      • 2.Qxc5#
    • 1...Rh4
      • 2.Qxc5#
  • Tries
    • 1.Sc7?
      • threat
        • 2.Qf6#
      • 1...Rf4
        • 2.Qxc5#
      • 1...Se4
        • 2.Sf3#
      • 1...Kd4!
    • 1.Qf6+?
      • 1...Kd5
        • 2.Sc7#
      • 1...Kd6!
    • 1.f4+?
      • 1...Rxf4
        • 2.Qxc5#
      • 1...Kd5!
  • Keys
    • 1.Sf4!
      • threat
        • 2.Qf6#
      • 1...Kd4
        • 2.Qf6#
      • 1...Rxf4
        • 2.Qxc5#
      • 1...Se4
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 5
  • Sets
    • R(b);N_GUARD::QAR2(E),XP(c)
    • R(b);N_GUARD,P_PINS(B)::QAR2(E),XP(c)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAB1(E)
      • Vars
        • R(b);N_GUARD,SBLOCK::QAR2(E),XP(c)
        • S(a);N_GUARD,SBLOCK::S(B)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(E);CHECK
      • Vars
        • K(d);P-FLIGHT::S(C)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • P(A);CHECK
      • Vars
        • R(b);XP(A)::QAR2(E),XP(c)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAB1(E)
    • Vars
      • K(d);S_FLIGHT::QAB(E)
      • R(b);N_GUARD,SBLOCK,XS(C)::QAR2(E),XP(c)
      • S(a);N_GUARD,SBLOCK::S(B)
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