MESON Chess Problem Database

Problem Display
PID: 240473 (8/8/2R5/8/pb6/kP1K4/8/1Q6 w - - 0 1)

Parkhomenko, Nikolai A

Problemist Ukraini, 2018

8/8/2R5/8/pb6/kP1K4/8/1Q6

#2

4 + 3

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...axb3
      • 2.Qa1#
  • Tries
    • 1.Rc3?
      • threat
        • 2.Qa1#
      • 1...Ba5
        • 2.b4#
      • 1...Bc5
        • 2.b4#
      • 1...Bd6
        • 2.b4#
      • 1...Be7
        • 2.b4#
      • 1...Bf8
        • 2.b4#
      • 1...Bxc3!
    • 1.Rb6?
      • 1...axb3
        • 2.Qa1#
      • 1...Be1
        • 2.Qa1#
      • 1...Bd2
        • 2.Qa1#
      • 1...Ba5
        • 2.Qa1#
      • 1...Bc5
        • 2.Qa1#
      • 1...Bd6
        • 2.Qa1#
      • 1...Be7
        • 2.Qa1#
      • 1...Bf8
        • 2.Qa1#
      • 1...Bc3!
  • Keys
    • 1.Rc4!
      • 1...axb3
        • 2.Qa1#
      • 1...Be1
        • 2.Rxa4#
      • 1...Bd2
        • 2.Rxa4#
      • 1...Bc3
        • 2.Rxa4#
      • 1...Ba5
        • 2.Rxa4#
      • 1...Bc5
        • 2.Rxa4#
      • 1...Bd6
        • 2.Rxa4#
      • 1...Be7
        • 2.Rxa4#
      • 1...Bf8
        • 2.Rxa4#

FEATURES

  • Static
    • TYPE = INCOMPLETE_BLOCK
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 0
  • Sets
    • P(b);SBLOCK,XP(B)::QAR2(A)
  • Tries
    • Try
      • R(D);
      • Threat
        • QAR2(A)
      • Vars
        • B(c);OGATE::R(D)+P(B)
      • Refutation
        • B(c);XR(D)
    • Try
      • R(D);
      • Vars
        • P(b);SBLOCK,XP(B)::QAR2(A)
        • B(c);::QAR2(A)
      • Refutation
        • B(c);
  • Actual
    • R(D);
    • Vars
      • P(b);SBLOCK,XP(B)::QAR2(A)
      • B(c);OGATE::R1(D),XP(b)
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