MESON Chess Problem Database

Problem Display
PID: 222641 (n5B1/3p3P/b3q3/K2kpN2/N1R5/P2p4/5n2/2Q5 w - - 0 1)

Studd, Alnod Ernest

3rd Prize, English Mechanic and World of Science, 1883

(First published on Fri Sep 21 1883)

n5B1/3p3P/b3q3/K2kpN2/N1R5/P2p4/5n2/2Q5

#2

8 + 8

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qf7
      • 2.Bxf7#
    • 1...Qxg8
      • 2.hxg8Q#
      • 2.hxg8B#
    • 1...Sb6
      • 2.Sxb6#
    • 1...Sc7
      • 2.Sb6#
    • 1...e4
      • 2.Rc5#
    • 1...d6
      • 2.Se3#
      • 2.Se7#
  • Tries
    • 1.Rb4?
      • threat
        • 2.Qc5#
      • 1...Qxg8
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...Qf7
        • 2.Bxf7#
      • 1...Bc4
        • 2.Qxc4#
      • 1...d6
        • 2.Se3#
        • 2.Se7#
      • 1...Se4!
  • Keys
    • 1.Qb1!
      • 1...Kxc4
        • 2.Qa2#
      • 1...Qxg8
        • 2.hxg8Q#
        • 2.hxg8B#
      • 1...Bxc4
        • 2.Qb7#
      • 1...Qf7
        • 2.Bxf7#
      • 1...e4
        • 2.Rc5#
      • 1...Se4
        • 2.Qxd3#
      • 1...Bb5
        • 2.Qxb5#
      • 1...Bb7
        • 2.Qb5#
      • 1...Bc8
        • 2.Qb5#
      • 1...Sd1
        • 2.Qxd3#
      • 1...Sh1
        • 2.Qxd3#
      • 1...Sh3
        • 2.Qxd3#
      • 1...Sg4
        • 2.Qxd3#
      • 1...Sb6
        • 2.Sxb6#
      • 1...Sc7
        • 2.Sb6#
      • 1...d2
        • 2.Rc5#
      • 1...d6
        • 2.Se3#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 12
    • REMOVED MATES = 0
  • Sets
    • Q(f);OGATEB::B(H),XQ(f)
    • Q(f);N_SPINQ(f),OGATE,XB(H)::PXQ(f)=Q
    • S(h);N_GUARD::S(C),XS(h)
    • S(h);N_GUARD::S(C)
    • P(d);SBLOCK::R1(D)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAR1(A)
      • Vars
        • Q(f);N_SPINQ(f),OGATE,XB(H)::PXQ(f)=Q
        • Q(f);OGATEB::B(H),XQ(f)
        • B(e);N_GUARD::QAB1(A),XB(e)
      • Refutation
        • S(a);
  • Actual
    • Q(A);
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(D)::QAB(A)
      • Q(f);N_SPINQ(f),OGATE,XB(H)::PXQ(f)=Q
      • B(e);N_GUARD,SBLOCK,XR(D)::QAB(A)
      • Q(f);OGATEB::B(H),XQ(f)
      • P(d);SBLOCK::R1(D)
      • S(a);N_GUARD::QAR2(A),XP(b)
      • B(e);N_GUARD::QAR2(A),XB(e)
      • B(e);N_GUARD::QAR2(A)
      • S(h);N_GUARD::S(C),XS(h)
      • S(h);N_GUARD::S(C)
      • P(b);::R1(D)
      • P(g);SBLOCK::S(F)
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