MESON Chess Problem Database

Problem Display
PID: 214379 (8/8/8/5n2/6B1/6p1/3B1k1b/2K4Q w - - 0 1)

Moore, Charles C

5. American Chess Congress, 1880

8/8/8/5n2/6B1/6p1/3B1k1b/2K4Q

#2

4 + 4

6490 yacpdb 2020
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg1
      • 2.Qf3#
    • 1...Se3
      • 2.Be1#
    • 1...g2
      • 2.Qe1#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Qg2#
      • 1...g2
        • 2.Qxg2#
      • 1...Se3
        • 2.Be1#
      • 1...Sh4!
    • 1.Bh3?
      • threat
        • 2.Qg2#
        • 2.Qf1#
      • 1...Ke2
        • 2.Qf1#
      • 1...g2
        • 2.Qxg2#
      • 1...Bg1
        • 2.Qg2#
      • 1...Sh4
        • 2.Qf1#
      • 1...Se3!
  • Keys
    • 1.Bc3!
      • 1...Ke3
        • 2.Qf3#
      • 1...Bg1
        • 2.Qf3#
      • 1...g2
        • 2.Qe1#
      • 1...Sd4
        • 2.Bxd4#
      • 1...Se3
        • 2.Be1#
      • 1...Sh4
        • 2.Bd4#
      • 1...Sd6
        • 2.Bd4#
      • 1...Sh6
        • 2.Bd4#
      • 1...Se7
        • 2.Bd4#
      • 1...Sg7
        • 2.Bd4#

This anticipates 100866(1921)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 0
  • Sets
    • B(b);SBLOCK::QAR1(B)
    • S(d);SBLOCK::B(C)
    • P(c);SBLOCK::QAB1(B)
  • Tries
    • Try
      • B(D);
      • Threat
        • QAR1(B)
      • Vars
        • P(c);::QAR1(B),XP(c)
        • S(d);SBLOCK::B(C)
      • Refutation
        • S(d);
    • Try
      • B(D);
      • Threat
        • DUALS(2)
      • Vars
        • K(a);P-FLIGHT::QAB1(B)
        • P(c);::QAR1(B),XP(c)
        • B(b);::QAR1(B)
        • S(d);::QAR1(B)
      • Refutation
        • S(d);
  • Actual
    • B(C);
    • Vars
      • K(a);S_FLIGHT::QAR1(B)
      • B(b);SBLOCK::QAR1(B)
      • P(c);SBLOCK::QAB1(B)
      • S(d);N_GUARD::B(C),XS(d)
      • S(d);SBLOCK::B(C)
      • S(d);N_GUARD::B(C)
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