MESON Chess Problem Database

Problem Display
PID: 155099 (4n3/B3K3/2pp4/2rrkN2/7p/7p/2B2QnP/8 w - - 0 1)

Kidson, Frank

Leeds Mercury Weekly Supplement, 1879

(First published on Sat Nov 15 1879)

4n3/B3K3/2pp4/2rrkN2/7p/7p/2B2QnP/8

#2

6 + 9

15239 Valois Notebooks 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Qxd4#
    • 1...Se1
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...Sf4
      • 2.Qe3#
  • Tries
    • 1.Qg3+?
      • 1...Sf4
        • 2.Qe3#
      • 1...hxg3!
    • 1.Qe2+?
      • 1...Se3
        • 2.Qxe3#
      • 1...Kf4!
  • Keys
    • 1.Sd4!
      • 1...Rxc2
        • 2.Qf5#
      • 1...Rxd4
        • 2.Qf5#
      • 1...Se3
        • 2.Qxe3#
      • 1...Rc3
        • 2.Qf5#
      • 1...Rc4
        • 2.Qf5#
      • 1...Ra5
        • 2.Sxc6#
        • 2.Qf5#
      • 1...Rb5
        • 2.Sxc6#
        • 2.Qf5#
      • 1...Se1
        • 2.Qe3#
      • 1...Sf4
        • 2.Sf3#
        • 2.Qe3#
      • 1...Sf6
        • 2.Qxf6#
      • 1...Sc7
        • 2.Qf6#
      • 1...Sg7
        • 2.Qf6#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 6
    • REMOVED MATES = 1
  • Sets
    • R(e);N_GUARD::QAB1(B),XR(e)
    • S(a);N_GUARD::QAR2(B)
    • S(a);N_GUARD::QAR2(B),XS(a)
  • Tries
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B)
      • Refutation
        • P(c);XQ(B)
    • Try
      • Q(B);CHECK
      • Vars
        • S(a);N_GUARD,P_SPINS(a)::QAR2(B),XS(a)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • S(D);
    • Vars
      • R(d);XB(A)::QAR1(B)
      • R(e);SBLOCK,XS(D)::QAR1(B)
      • S(a);N_GUARD::QAR2(B),XS(a)
      • R(d);::QAR1(B)
      • S(a);N_GUARD::QAR2(B)
      • S(i);N_GUARD::QAB1(B),XS(i)
      • S(i);N_GUARD::QAB1(B)
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