MESON Chess Problem Database

Problem Display
PID: 32677 (8/pB6/2p5/kbK5/1R6/1P6/8/8 w - - 0 1)

Thompson, Theophilus Augustus

Chess Problems by Theophilus A. Thompson, 1873

8/pB6/2p5/kbK5/1R6/1P6/8/8

#2

4 + 4

SOLUTION

  • SOUND
  • Sets
    • 1...Bf1
      • 2.Ra4#
    • 1...Be2
      • 2.Ra4#
    • 1...Bd3
      • 2.Ra4#
    • 1...Ba4
      • 2.Rxa4#
    • 1...Bc4
      • 2.Ra4#
    • 1...Ba6
      • 2.Ra4#
  • Tries
    • 1.Ba6?
      • 1...Bxa6
        • 2.Ra4#
      • 1...Bf1
        • 2.Ra4#
      • 1...Be2
        • 2.Ra4#
      • 1...Bd3
        • 2.Ra4#
      • 1...Ba4
        • 2.Rxa4#
      • 1...Bc4
        • 2.Ra4#
      • 1...Kxa6!
    • 1.Bc8?
      • 1...Bf1
        • 2.Ra4#
      • 1...Be2
        • 2.Ra4#
      • 1...Bd3
        • 2.Ra4#
      • 1...Ba4
        • 2.Rxa4#
      • 1...Bc4
        • 2.Ra4#
      • 1...Ba6
        • 2.Ra4#
      • 1...a6!
  • Keys
    • 1.Ra4+!
      • 1...Bxa4
        • 2.b4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 1
    • ADDED MATES = 0
    • REMOVED MATES = 5
  • Sets
    • B(b);N_GUARD::R1(B)
    • B(b);N_GUARD::R1(B),XB(b)
  • Tries
    • Try
      • B(D);
      • Vars
        • B(b);N_GUARD,SBLOCK,XB(D)::R1(B)
        • B(b);N_GUARD::R1(B)
        • B(b);N_GUARD::R1(B),XB(b)
      • Refutation
        • K(a);P-FLIGHT,XB(D)
    • Try
      • B(D);
      • Vars
        • B(b);N_GUARD::R1(B)
        • B(b);N_GUARD::R1(B),XB(b)
      • Refutation
        • P(d);
  • Actual
    • R(B);CHECK
    • Vars
      • B(b);SBLOCK,XR(B)::P(A)
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