MESON Chess Problem Database

Problem Display
PID: 47236 (8/8/8/1n1N4/5p2/5N1n/2Qpk1K1/4b3 w - - 0 1)

Opdenoordt, Joseph J

4th Prize=, Good Companions (February Meredith Ty.), 1917

8/8/8/1n1N4/5p2/5N1n/2Qpk1K1/4b3

#2

4 + 6

3132 The Good Companion Two-Mover 1922
3310 2345 Chess Problems 1997
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Bf2
      • 2.Qxd2#
    • 1...Bg3
      • 2.Qxd2#
    • 1...Bh4
      • 2.Qxd2#
    • 1...Sg1
      • 2.Sxg1#
    • 1...Sf2
      • 2.Sg1#
    • 1...Sg5
      • 2.Sg1#
    • 1...Sa3
      • 2.Sd4#
    • 1...Sc3
      • 2.Sd4#
    • 1...Sd4
      • 2.Sxd4#
    • 1...Sd6
      • 2.Sd4#
    • 1...Sa7
      • 2.Sd4#
    • 1...Sc7
      • 2.Sd4#
  • Tries
    • 1.Sc3+?
      • 1...Ke3
        • 2.Qe4#
      • 1...Sxc3!
  • Keys
    • 1.Qb1!
      • 1...d1Q
        • 2.Qe4#
      • 1...d1S
        • 2.Qxb5#
      • 1...d1B
        • 2.Qe4#
        • 2.Qxb5#
      • 1...d1R
        • 2.Qe4#
      • 1...Sg1
        • 2.Sxg1#
      • 1...Bf2
        • 2.Qf1#
      • 1...Bg3
        • 2.Qf1#
      • 1...Bh4
        • 2.Qf1#
      • 1...Sf2
        • 2.Sg1#
      • 1...Sg5
        • 2.Sg1#
      • 1...Sa3
        • 2.Sd4#
      • 1...Sc3
        • 2.Sd4#
      • 1...Sd4
        • 2.Sxd4#
      • 1...Sd6
        • 2.Sd4#
      • 1...Sa7
        • 2.Sd4#
      • 1...Sc7
        • 2.Sd4#

This anticipates 22080(1924), 102450(1988)

FEATURES

  • Static
    • TYPE = MUTATE
    • CHANGED MATES = 3
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::QAR1(A),XP(b)
    • S(d);N_GUARD::S(C),XS(d)
    • S(d);N_GUARD::S(C)
    • S(f);N_GUARD::S(C)
    • S(f);N_GUARD::S(C),XS(f)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • K(c);N_SPINP(b),P-FLIGHT::QAR1(A)
      • Refutation
        • S(f);XS(D)
  • Actual
    • Q(A);N_PINP(b)
    • Vars
      • P(b);SBLOCK::QAR2(A)
      • P(b);SBLOCK::QAB(A),XS(f)
      • S(d);N_GUARD::S(C),XS(d)
      • B(a);OGATE::QAB1(A)
      • S(d);N_GUARD::S(C)
      • S(f);N_GUARD::S(C)
      • S(f);N_GUARD::S(C),XS(f)
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