MESON Chess Problem Database

Problem Display
PID: 224552 (R5Q1/8/3pNK2/3R4/4k3/4b1B1/8/1N3B1b w - - 0 1)

Bolus, Andrew

English Mechanic and World of Science, 1887

(First published on Fri Dec 9 1887)

R5Q1/8/3pNK2/3R4/4k3/4b1B1/8/1N3B1b

#2

8 + 4

6490 yacpdb 2020
15239 Valois Notebooks 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Bg2
      • 2.Bxg2#
    • 1...Bf3
      • 2.Sc3#
  • Tries
    • 1.Rd4+?
      • 1...Kf3
        • 2.Qg4#
      • 1...Bxd4+!
    • 1.Ra4+?
      • 1...Kf3
        • 2.Qg4#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Bd4+!
    • 1.Qh7+?
      • 1...Kxd5
        • 2.Qxh1#
        • 2.Qb7#
      • 1...Kf3!
    • 1.Qg4+?
      • 1...Kxd5
        • 2.Qc4#
      • 1...Bf4!
  • Keys
    • 1.Ra3!
      • 1...Bd4+
        • 2.Rxd4#
      • 1...Bg5+
        • 2.Sxg5#
      • 1...Kf3
        • 2.Sd2#
      • 1...Kxd5
        • 2.Qa8#
      • 1...Bg2
        • 2.Bxg2#
      • 1...Bf3
        • 2.Sc3#
      • 1...Bc1
        • 2.Rd4#
      • 1...Bg1
        • 2.Sg5#
      • 1...Bd2
        • 2.Rd4#
      • 1...Bf2
        • 2.Sg5#
      • 1...Bf4
        • 2.Rd4#
      • 1...Bc5
        • 2.Sg5#
      • 1...Bb6
        • 2.Sg5#
      • 1...Bh6
        • 2.Rd4#
      • 1...Ba7
        • 2.Sg5#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 13
    • REMOVED MATES = 0
  • Sets
    • B(a);N_GUARD::B(B),XB(a)
    • B(a);SBLOCK::S(A)
  • Tries
    • Try
      • R(D);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(H)
      • Refutation
        • B(b);CHECK,XR(D)
    • Try
      • R(G);CHECK
      • Vars
        • K(c);S_FLIGHT::QAB1(H)
        • K(c);S_FLIGHT,XR(D)::QAB(H)
      • Refutation
        • B(b);CHECK,P_SPINB(b)
    • Try
      • Q(H);CHECK
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(H);CHECK
      • Vars
        • K(c);OGATE,S_FLIGHT,XR(D)::QAB1(H)
      • Refutation
        • B(b);P_SPINB(b)
  • Actual
    • R(G);
    • Vars
      • B(b);CHECK,N_GUARD::R1(D),XB(b)
      • B(b);CHECK,N_GUARD::S(E),XB(b)
      • K(c);P_SPINB(b),S_FLIGHT::S(A)
      • K(c);OGATEB,S_FLIGHT,XR(D)::QAB(H)
      • B(a);N_GUARD::B(B),XB(a)
      • B(a);SBLOCK::S(A)
      • B(b);N_GUARD::R1(D)
      • B(b);N_GUARD::S(E)
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