MESON Chess Problem Database

Problem Display
PID: 21260 (8/3pB2p/2r5/R2N1p2/2pk4/1p1r2p1/n2P2b1/1K1RQ1bq w - - 0 1)

Larsen, Peder Andreas

Tidskrift for Schack, 1917

8/3pB2p/2r5/R2N1p2/2pk4/1p1r2p1/n2P2b1/1K1RQ1bq

#2

7 + 13

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Rxd2#
    • 1...Rc3
      • 2.dxc3#
    • 1...Rf6
      • 2.Bxf6#
    • 1...Rc7
      • 2.Bf6#
    • 1...Rc8
      • 2.Bf6#
    • 1...Sc3+
      • 2.dxc3#
    • 1...d6
      • 2.Bf6#
  • Keys
    • 1.Sc3!
      • threat
        • 2.Qe5#
      • 1...Sxc3+
        • 2.dxc3#
      • 1...Rxd2
        • 2.Qxd2#
      • 1...Rxc3
        • 2.dxc3#
      • 1...Re3
        • 2.dxe3#
      • 1...Rf3
        • 2.Rd5#
      • 1...Rc5
        • 2.Bxc5#
      • 1...Re6
        • 2.Bc5#
      • 1...Be3
        • 2.dxe3#
      • 1...Be4
        • 2.Se2#
      • 1...Bd5
        • 2.Sb5#
      • 1...d5
        • 2.Sb5#
      • 1...d6
        • 2.Bf6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • R(f);OGATE,P_SPINR(f),XP(D)::R(B),XR(f)
    • R(f);OGATE::R(B)+P(D)DCHECK,XR(f)
    • R(k);N_GUARD::B(G),XR(k)
    • R(k);N_GUARD::B(G)
    • S(c);CHECK,OGATE::P(D),XS(c)
    • P(l);S_CUTR(k)::B(G)
  • Actual
    • S(F);
    • Threat
      • QAB1(C)
    • Vars
      • S(c);CHECK,OGATE,XS(F)::P(D),XS(c)
      • R(f);OGATE,P_SPINR(f),XP(D)::QAR2(C),XR(f)
      • R(f);OGATE,XS(F)::R(B)+P(D)DCHECK,XR(f)
      • R(f);OGATE::R(B)+P(D)DCHECK,XR(f)
      • R(f);S_CUTB(d)::R1(E)
      • R(k);N_GUARD::B(G),XR(k)
      • R(k);N_GUARD::B(G)
      • B(a);OGATE::P(D),XB(a)
      • B(d);SBLOCK::S(F)
      • P(l);SBLOCK::S(F)
      • P(l);S_CUTR(k)::B(G)
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