MESON Chess Problem Database

Problem Display
PID: 93234 (5r2/1p1R4/6Q1/2p1k3/1BP5/1K2p3/8/8 w - - 0 1)

Scheel, Johan

Norsk Skakbladet, 1907

5r2/1p1R4/6Q1/2p1k3/1BP5/1K2p3/8/8

#2

5 + 5

6490 yacpdb 2009
5454 Near Snap 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rf4
      • 2.Rd5#
  • Tries
    • 1.Re7+?
      • 1...Kd4
        • 2.Bc3#
        • 2.Qe4#
        • 2.Qd6#
      • 1...Kf4!
  • Keys
    • 1.Rd4!
      • threat
        • 2.Re4#
      • 1...Kxd4
        • 2.Bc3#
      • 1...cxd4
        • 2.Bd6#
      • 1...Rf6
        • 2.Qe4#
      • 1...Rf4
        • 2.Rd5#
      • 1...Rf5
        • 2.Qd6#

Anticipated by 23426(1886), 158655(1906-1907)

This anticipates 107876(1963)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 0
  • Sets
    • R(e);SBLOCK::R1(E)
  • Tries
    • Try
      • R(E);CHECK
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(E);
    • Threat
      • R1(E)
    • Vars
      • K(c);OGATEB,S_FLIGHT,XR(E)::B(B)
      • P(b);OGATE,SBLOCK,XR(E)::B(B)
      • R(e);SBLOCK::QAR1(D)
      • R(e);SBLOCK::R1(E)
      • R(e);SBLOCK::QAB1(D)
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