MESON Chess Problem Database

Problem Display
PID: 103986 (8/8/2Q5/3rk3/2R3P1/4p1K1/8/8 w - - 0 1)

Hannelius, Jan Ingvar

Suomen Shakki, 1949

8/8/2Q5/3rk3/2R3P1/4p1K1/8/8

#2

4 + 3

5454 Near Snap 2009
6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Re4#
    • 1...Rd2
      • 2.Re4#
    • 1...Rd3
      • 2.Re4#
    • 1...Ra5
      • 2.Re4#
    • 1...Rb5
      • 2.Re4#
    • 1...Rc5
      • 2.Re4#
    • 1...Rd7
      • 2.Re4#
    • 1...Rd8
      • 2.Re4#
  • Tries
    • 1.Qe8+?
      • 1...Kd6
        • 2.Rc6#
      • 1...Kf6!
  • Keys
    • 1.Rf4!
      • threat
        • 2.Qf6#
      • 1...Rd6
        • 2.Qe4#
      • 1...Rd4
        • 2.Rf5#
      • 1...Rd1
        • 2.Re4#
      • 1...Rd2
        • 2.Re4#
      • 1...Rd3
        • 2.Re4#
      • 1...Ra5
        • 2.Re4#
      • 1...Rb5
        • 2.Re4#
      • 1...Rc5
        • 2.Re4#
      • 1...Rd7
        • 2.Re4#
      • 1...Rd8
        • 2.Re4#

Anticipated by 205553(1925), 16598(1941)

This anticipates 176155(1953)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • R(b);::R1(B)
  • Tries
    • Try
      • Q(D);CHECK
      • Vars
        • K(c);S_FLIGHT::R1(B)
      • Refutation
        • K(c);S_FLIGHT
  • Actual
    • R(B);
    • Threat
      • QAB1(D)
    • Vars
      • R(b);OGATE,SBLOCK::QAR1(D)
      • R(b);SBLOCK::R1(B)
      • R(b);::R1(B)
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