MESON Chess Problem Database

Problem Display
PID: 176159 (8/2Q5/8/3kbK2/r4R2/8/4N3/8 w - - 0 1)

Serwene, Peter

Schach-Echo, 1954

8/2Q5/8/3kbK2/r4R2/8/4N3/8

#2

4 + 3

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Sc3#
    • 1...Bc3
      • 2.Sxc3#
    • 1...Bd6
      • 2.Sc3#
  • Tries
    • 1.Rxa4?
      • threat
        • 2.Ra5#
      • 1...Bc3
        • 2.Sxc3#
        • 2.Sf4#
      • 1...Bd4
        • 2.Sf4#
        • 2.Rxd4#
      • 1...Bd6
        • 2.Sc3#
        • 2.Rd4#
        • 2.Qc4#
      • 1...Bxc7!
  • Keys
    • 1.Rd4+!
      • 1...Rxd4
        • 2.Sc3#
      • 1...Bxd4
        • 2.Sf4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 2
  • Sets
    • R(a);S_CUTB(c)::S(A)
    • B(c);N_GUARD::S(A),XB(c)
    • B(c);N_GUARD::S(A)
  • Tries
    • Try
      • R(B);XR(a)
      • Threat
        • R(B)
      • Refutation
        • B(c);XQ(D)
  • Actual
    • R(B);CHECK
    • Vars
      • R(a);SBLOCK,XR(B)::S(A)
      • B(c);SBLOCK,XR(B)::S(A)
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