MESON Chess Problem Database

Problem Display
PID: 2000 (2B5/8/4pN1K/R1B1qkP1/4p3/7p/5P1P/4Q3 w - - 0 1)

Abraham, JD

Source?, 0000

2B5/8/4pN1K/R1B1qkP1/4p3/7p/5P1P/4Q3

#2

9 + 5

1679 American Chess Nuts 1868
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qa1
      • 2.Qxe4#
    • 1...Qb2
      • 2.Qxe4#
    • 1...Qxh2
      • 2.Qxe4#
    • 1...Qc3
      • 2.Qxe4#
    • 1...Qg3
      • 2.Qxe4#
    • 1...Qd6
      • 2.Bxd6#
      • 2.Qxe4#
    • 1...Qc7
      • 2.Qxe4#
    • 1...Qb8
      • 2.Qxe4#
    • 1...Qxc5
      • 2.Qxe4#
  • Tries
    • 1.Bd6?
      • threat
        • 2.Qxe4#
      • 1...Kf4
        • 2.Qxe4#
      • 1...e3!
  • Keys
    • 1.Be3!
      • 1...Qxa5
        • 2.Qxa5#
      • 1...Qb5
        • 2.Rxb5#
      • 1...Qc5
        • 2.Rxc5#
      • 1...Qd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 7
  • Sets
    • Q(c);N_GUARD::QAB1(A),XP(b)
    • Q(c);N_GUARD,XP(C)::QAB1(A),XP(b)
    • Q(c);N_GUARD,P_SPINQ(c),XB(E)::QAB1(A),XP(b)
  • Tries
    • Try
      • B(E);P_PINQ(c)
      • Threat
        • QAB1(A),XP(b)
      • Vars
        • K(d);N_SPINP(e),P-FLIGHT::QAR1(A),XP(b)
      • Refutation
        • P(b);
  • Actual
    • B(E);P_PINQ(c)
    • Vars
      • Q(c);N_SPINQ(c),OGATE,XR(D)::QAR(A),XQ(c)
      • Q(c);OGATEB::R(D),XQ(c)
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