MESON Chess Problem Database

Problem Display
PID: 175517 (4Q3/8/R4p2/1Nn2B2/2k5/K2p1P2/3P4/8 w - - 0 1)

Hicks, GJ

San Francisco Chronicle, 1899

4Q3/8/R4p2/1Nn2B2/2k5/K2p1P2/3P4/8

#2

7 + 4

6490 yacpdb 2018
5454 Near Snap 2019

SOLUTION

  • SOUND
  • Tries
    • 1.Ra4+?
      • 1...Kd5
        • 2.Rd4#
      • 1...Sxa4!
    • 1.Qe5?
      • threat
        • 2.Sd6#
      • 1...Kxb5
        • 2.Bxd3#
      • 1...Se4
        • 2.Be6#
        • 2.Ra4#
      • 1...Sb7
        • 2.Be6#
        • 2.Ra4#
      • 1...fxe5!
  • Keys
    • 1.Qh5!
      • 1...Kxb5
        • 2.Bxd3#
      • 1...Kd5
        • 2.Be6#
      • 1...Sxa6
        • 2.Be6#
      • 1...Sb3
        • 2.Be6#
      • 1...Sa4
        • 2.Be6#
      • 1...Se4
        • 2.Be6#
      • 1...Se6
        • 2.Bxe6#
      • 1...Sb7
        • 2.Be6#
      • 1...Sd7
        • 2.Be6#

This anticipates 73245(1993)

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 9
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • K(b);OGATE,S_FLIGHT::R1(F)
      • Refutation
        • S(c);XR(F)
    • Try
      • Q(G);
      • Threat
        • S(D)
      • Vars
        • K(b);P_SPINS(c),S_FLIGHT,XS(D)::B(E),XP(a)
      • Refutation
        • P(d);XQ(G)
  • Actual
    • Q(G);
    • Vars
      • K(b);S_FLIGHT,XS(D)::B(E),XP(a)
      • K(b);S_FLIGHT::QAR(G)+B(E),DCHECK
      • S(c);N_GUARD,XR(F)::B(E)
      • S(c);N_GUARD::B(E)
      • S(c);N_GUARD::B(E),XS(c)
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