MESON Chess Problem Database

Problem Display
PID: 240620 (2B5/8/8/5R1p/6k1/8/7P/5KN1 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1980

2B5/8/8/5R1p/6k1/8/7P/5KN1

#2

5 + 2

15148 Sadier Collection 2021
5454 Near Snap 2022

SOLUTION

  • SOUND
  • Tries
    • 1.Kf2?
      • 1...h4
        • 2.h3#
      • 1...Kh4!
    • 1.Kg2?
      • 1...h4
        • 2.h3#
      • 1...Kh4!
    • 1.Sf3?
      • threat
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...Kh3
        • 2.Rf4#
        • 2.Ra5#
        • 2.Rb5#
        • 2.Rc5#
        • 2.Rd5#
        • 2.Re5#
        • 2.Rg5#
        • 2.Rxh5#
        • 2.Rf6#
        • 2.Rf7#
        • 2.Rf8#
      • 1...h4!
    • 1.Rf2+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kg5!
    • 1.Ra5+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kf4!
    • 1.Rb5+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kf4!
    • 1.Rc5+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kf4!
    • 1.Rd5+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kf4!
    • 1.Re5+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kf4!
    • 1.Rf6+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kg5!
    • 1.Rf7+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kg5!
    • 1.Rf8+?
      • 1...Kh4
        • 2.Sf3#
      • 1...Kg5!
  • Keys
    • 1.Sh3!
      • threat
        • 2.Rf4#
      • 1...Kxh3
        • 2.Rxh5#
      • 1...Kh4
        • 2.Rf4#
      • 1...h4
        • 2.Sf2#

This anticipates 79168(1992)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
  • Tries
    • Try
      • K(A);P-FLIGHT
      • Vars
        • P(b);SBLOCK::P(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • K(A);S_FLIGHT
      • Vars
        • P(b);SBLOCK::P(C)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • S(B);
      • Threat
        • DUALS(3)
      • Refutation
        • P(b);
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
    • Try
      • R(D);CHECK
      • Vars
        • K(a);P-FLIGHT::S(B)
      • Refutation
        • K(a);P-FLIGHT
  • Actual
    • S(B);
    • Threat
      • B(E)+R(D),DCHECK
    • Vars
      • K(a);S_FLIGHT,XS(B)::B(E)+R(D),DCHECK,XP(b)
      • K(a);P-FLIGHT::R(D)
      • P(b);SBLOCK::S(B)
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