MESON Chess Problem Database

Problem Display
PID: 240712 (3RQ3/1p3p1b/3b3q/rpR4r/n2kP1p1/BP1N2Np/1PP2P1K/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Thema Danicum, 1994

3RQ3/1p3p1b/3b3q/rpR4r/n2kP1p1/BP1N2Np/1PP2P1K/8

#2

12 + 12

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Rh4
      • 2.Rd5#
      • 2.Qe5#
    • 1...Rd5
      • 2.Rxd5#
    • 1...Re5
      • 2.Qxe5#
    • 1...Bxe4
      • 2.Qxe4#
    • 1...Bf5
      • 2.Rd5#
      • 2.Qe5#
    • 1...Sxb2
      • 2.Bxb2#
    • 1...Sc3
      • 2.bxc3#
    • 1...b4
      • 2.Rc4#
    • 1...f5
      • 2.Rd5#
      • 2.Qe5#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Sge2#
        • 2.Sfe2#
      • 1...b4
        • 2.Rc4#
      • 1...Qe6
        • 2.Sfe2#
      • 1...Re5
        • 2.Sfe2#
        • 2.Qxe5#
      • 1...Sc3
        • 2.bxc3#
      • 1...Qxf4!
    • 1.Se5?
      • threat
        • 2.Rd5#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Bxe4
        • 2.Se2#
      • 1...Sxb2
        • 2.c3#
      • 1...Sxc5
        • 2.c3#
      • 1...b4
        • 2.Rc4#
      • 1...Sc3
        • 2.bxc3#
      • 1...Sb6
        • 2.c3#
      • 1...Qe6!
    • 1.Rxd6+?
      • 1...Rd5
        • 2.Se2#
        • 2.Rcxd5#
        • 2.Rdxd5#
        • 2.Qe5#
      • 1...Qxd6!
  • Keys
    • 1.Re5!
      • threat
        • 2.Se2#
      • 1...Rxe5
        • 2.Qxe5#
      • 1...Qd2
        • 2.Rxd6#
      • 1...Qe3
        • 2.Rxd6#
      • 1...Qf4
        • 2.Rxd6#
      • 1...Sc3
        • 2.Bc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 4
  • Sets
    • R(g);N_GUARD,N_SPINB(h)::R1(J),XR(g)
    • R(g);N_GUARD,N_PINS(H)::QAB1(L),XR(g)
    • B(l);OGATE,XP(I)::QAR1(L),XB(l)
    • S(b);OGATE,XP(A)::B(E),XS(b)
    • S(b);OGATE::P(A),XS(b)
    • P(f);N_GUARD::R1(J)
  • Tries
    • Try
      • S(G);N_SPINS(H)
      • Threat
        • DUALS(2)
      • Vars
        • P(f);N_GUARD::R1(J)
        • Q(i);::S(G)
        • S(b);OGATE::P(A),XS(b)
      • Refutation
        • Q(i);P_PINS(H),XS(G)
    • Try
      • S(G);N_SPINS(H)
      • Threat
        • R1(J)
      • Vars
        • R(g);OGATE,XS(G)::QAB1(L),XR(g)
        • B(l);SBLOCK,XP(I)::S(H)
        • S(b);N_GUARD,XP(A)::P(B)
        • S(b);N_GUARD,XR(J)::P(B)
        • P(f);N_GUARD::R1(J)
        • S(b);OGATE::P(A),XS(b)
        • S(b);N_GUARD::P(B)
      • Refutation
        • Q(i);
    • Try
      • R(K);CHECK,N_SPINS(H),XB(h)
      • Refutation
        • Q(i);P_PINS(H),XR(K)
  • Actual
    • R(J);N_SPINS(H)
    • Threat
      • S(H)
    • Vars
      • R(g);OGATE,XR(J)::QAB1(L),XR(g)
      • Q(i);N_GUARD,P_PINP(C)::R(K),XB(h)
      • Q(i);N_GUARD::R(K),XB(h)
      • Q(i);N_GUARD,P_PINS(H)::R(K),XB(h)
      • S(b);N_GUARD::B(E)
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