MESON Chess Problem Database

Problem Display
PID: 240691 (r7/2Pp4/B1kP4/P7/nB2b2R/2b2N2/8/2RQ3K w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1988

r7/2Pp4/B1kP4/P7/nB2b2R/2b2N2/8/2RQ3K

#2

10 + 6

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rb8
      • 2.cxb8S#
    • 1...Rd8
      • 2.cxd8S#
    • 1...Bb1
      • 2.Se5#
    • 1...Bxf3+
      • 2.Qxf3#
    • 1...Bd5
      • 2.Qxa4#
    • 1...Bf5
      • 2.Se5#
    • 1...Bg6
      • 2.Se5#
    • 1...Bh7
      • 2.Se5#
  • Tries
    • 1.Rxc3+?
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sxc3!
  • Keys
    • 1.Rh5!
      • threat
        • 2.Qxa4#
      • 1...Bxf3+
        • 2.Qxf3#
      • 1...Rxa6
        • 2.c8Q#
      • 1...Rb8
        • 2.cxb8S#
      • 1...Bc2
        • 2.Qd5#
      • 1...Bd3
        • 2.Sd4#
      • 1...Bf5
        • 2.Se5#
      • 1...Sb2
        • 2.Rc5#
      • 1...Sc5
        • 2.Rxc5#
      • 1...Sb6
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 5
  • Sets
    • R(f);OGATE::PXR(f)=S
    • B(c);N_PINS(D)::S(D)
    • B(c);CHECK,OGATE,XS(D)::QAB(B),XB(c)
    • B(c);SBLOCK::QAB(B),XS(b)
  • Tries
    • Try
      • R(A);CHECK,XB(a)
      • Vars
        • S(b);N_GUARD,P_SPINS(b)::R1(A),XS(b)
      • Refutation
        • S(b);XR(A)
  • Actual
    • R(F);
    • Threat
      • QAB(B),XS(b)
    • Vars
      • B(c);CHECK,OGATE,XS(D)::QAB(B),XB(c)
      • R(f);N_GUARD,XB(H)::P=Q
      • R(f);OGATE::PXR(f)=S
      • B(c);N_GUARD,N_PINS(D),N_SPINB(a)::QAB1(B)
      • B(c);N_PINS(D)::S(D)
      • S(b);N_GUARD::R1(F)
      • S(b);N_GUARD,N_SPINB(a)::R1(F),XS(b)
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