MESON Chess Problem Database

Problem Display
PID: 30798 (8/6p1/1KNk1pn1/3pp1Q1/2pp2B1/n1N5/7R/6B1 w - - 0 1)

Atkinson, HL

Yorkshire Post, 1909

8/6p1/1KNk1pn1/3pp1Q1/2pp2B1/n1N5/7R/6B1

#2

7 + 9

15 British Chess Magazine 1911
3530 Het Half Pin Thema (II) 1947

SOLUTION

  • SOUND
  • Sets
    • 1...Sb1
      • 2.Sb5#
    • 1...Sc2
      • 2.Sb5#
    • 1...Sb5
      • 2.Sxb5#
    • 1...dxc3
      • 2.Bc5#
    • 1...d3
      • 2.Bc5#
    • 1...e4
      • 2.Qxd5#
  • Tries
    • 1.Bxd4?
      • threat
        • 2.Bc5#
      • 1...exd4
        • 2.Qxd5#
      • 1...f5!
    • 1.Qc1?
      • threat
        • 2.Qxa3#
      • 1...Sb1
        • 2.Sb5#
      • 1...Sc2
        • 2.Sb5#
      • 1...Sb5
        • 2.Sxb5#
      • 1...f5!
    • 1.Qf5?
      • threat
        • 2.Qe6#
        • 2.Qd7#
      • 1...Sf4
        • 2.Qd7#
      • 1...Sf8!
    • 1.Qxg6?
      • 1...dxc3
        • 2.Bc5#
      • 1...Sb1
        • 2.Sb5#
      • 1...Sc2
        • 2.Sb5#
      • 1...Sb5
        • 2.Sxb5#
      • 1...d3
        • 2.Bc5#
      • 1...e4!
  • Keys
    • 1.Rh6!
      • 1...dxc3
        • 2.Bc5#
      • 1...fxg5
        • 2.Rxg6#
      • 1...gxh6
        • 2.Qxf6#
      • 1...f5
        • 2.Qe7#
      • 1...Sf4
        • 2.Qxe5#
      • 1...Sb1
        • 2.Sb5#
      • 1...Sc2
        • 2.Sb5#
      • 1...Sb5
        • 2.Sxb5#
      • 1...Sh4
        • 2.Qxe5#
      • 1...Se7
        • 2.Qxe5#
      • 1...Sf8
        • 2.Qxe5#
      • 1...Sh8
        • 2.Qxe5#
      • 1...d3
        • 2.Bc5#
      • 1...e4
        • 2.Qxd5#

There are these versions: 140968

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • S(a);N_GUARD::S(C)
    • S(a);N_GUARD::S(C),XS(a)
    • P(c);OGATE,XS(C)::B(A)
    • P(c);OGATE::B(A)
    • P(e);OGATE::QAR1(E),XP(d)
  • Tries
    • Try
      • B(A);XP(c)
      • Threat
        • B(A)
      • Vars
        • P(e);OGATE,XB(A)::QAR1(E),XP(d)
      • Refutation
        • P(g);
    • Try
      • Q(E);
      • Threat
        • QAB(E),XS(a)
      • Vars
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
      • Refutation
        • P(g);
    • Try
      • Q(E);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);::QAR1(E)
      • Refutation
        • S(h);
    • Try
      • Q(E);P_PINP(g),XS(h)
      • Vars
        • P(c);OGATE,XS(C)::B(A)
        • S(a);N_GUARD::S(C)
        • S(a);N_GUARD::S(C),XS(a)
        • P(c);OGATE::B(A)
      • Refutation
        • P(e);
  • Actual
    • R(B);
    • Vars
      • P(c);OGATE,XS(C)::B(A)
      • P(g);OGATEB,P_SPINS(h),XQ(E)::R(B),XS(h)
      • P(i);N_GUARD,XR(B)::QAR2(E),XP(g)
      • P(g);OGATE,P_SPINS(h)::QAB1(E)
      • S(h);N_GUARD,P_SPINP(g)::QAB1(E),XP(e)
      • S(a);N_GUARD::S(C)
      • S(a);N_GUARD::S(C),XS(a)
      • P(c);OGATE::B(A)
      • P(e);OGATE::QAR1(E),XP(d)
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