MESON Chess Problem Database

Problem Display
PID: 21112 (3R4/1N6/p1pN3K/3r1P2/1pPk4/1P2R3/8/6B1 w - - 0 1)

Ingstad, Helge

Morgenbladet, 1916

3R4/1N6/p1pN3K/3r1P2/1pPk4/1P2R3/8/6B1

#2

9 + 5

SOLUTION

  • SOUND
  • Sets
    • 1...Ra5
      • 2.Sb5#
    • 1...Rb5
      • 2.Sxb5#
    • 1...Rc5
      • 2.Sb5#
    • 1...Re5
      • 2.Sb5#
    • 1...Rxf5
      • 2.Sb5#
      • 2.Sxf5#
    • 1...Rxd6+
      • 2.Rxd6#
  • Tries
    • 1.Sb5+?
      • 1...cxb5
        • 2.Rxd5#
      • 1...axb5!
    • 1.c5?
      • 1...Rxd6+
        • 2.Rxd6#
      • 1...Rxc5
        • 2.Sb5#
      • 1...Rxf5
        • 2.Sb5#
        • 2.Sxf5#
      • 1...Re5
        • 2.Sb5#
      • 1...a5!
    • 1.f6?
      • threat
        • 2.Sf5#
      • 1...Rxd6
        • 2.Rxd6#
      • 1...Rf5
        • 2.Sb5#
        • 2.Sxf5#
      • 1...Rh5+!
  • Keys
    • 1.Sc5!
      • threat
        • 2.Se6#
      • 1...Kxc5
        • 2.Re5#
      • 1...Rxc5
        • 2.Sb5#
      • 1...Re5
        • 2.Rd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • R(c);::R(I)+S(F),DCHECK
    • R(c);::R(I)+S(F),DCHECK,XR(c)
    • R(c);CHECK,OGATE,P_SPINR(c),XS(F)::R(I),XR(c)
  • Tries
    • Try
      • S(F);CHECK,P_PINR(c)
      • Vars
        • P(e);XS(F)::R1(I),XR(c)
      • Refutation
        • P(d);XS(F)
    • Try
      • P(D);
      • Vars
        • R(c);CHECK,OGATE,P_SPINR(c),XS(F)::R(I),XR(c)
        • R(c);XP(D)::R(I)+S(F),DCHECK
        • R(c);::R(I)+S(F),DCHECK
      • Refutation
        • P(d);
    • Try
      • P(E);
      • Threat
        • S(F)
      • Vars
        • R(c);OGATE,P_PINP(E),P_SPINR(c),XS(F)::R(I),XR(c)
      • Refutation
        • R(c);CHECK
  • Actual
    • S(H);
    • Threat
      • S(H)
    • Vars
      • K(b);S_FLIGHT,XS(H)::B(A)+R(C)
      • R(c);SBLOCK,XS(H)::R(I)+S(F),DCHECK
      • R(c);SBLOCK::B(A)+R(C),DCHECK
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