MESON Chess Problem Database

Problem Display
PID: 261284 (r1N2N2/b3Bb1p/2B5/RnQnk2r/1p4P1/1K1PP1P1/4R3/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Neue Zurcher Zeitung, 1983

r1N2N2/b3Bb1p/2B5/RnQnk2r/1p4P1/1K1PP1P1/4R3/8

#2

12 + 9

6490 yacpdb 2022

SOLUTION

  • SOUND
  • Sets
    • 1...Bg6
      • 2.Qxd5#
    • 1...Be8
      • 2.Qxd5#
    • 1...Sa3
      • 2.Qd6#
    • 1...Sc3
      • 2.Qd6#
    • 1...Sd4+
      • 2.exd4#
    • 1...Sd6
      • 2.Qxd6#
    • 1...Sc7
      • 2.Qd6#
  • Tries
    • 1.Sd6?
      • threat
        • 2.Sc4#
        • 2.Sxf7#
      • 1...Sd4+
        • 2.exd4#
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Rf5
        • 2.Sc4#
      • 1...Be6
        • 2.Sc4#
      • 1...Bg6
        • 2.Sc4#
        • 2.Qxd5#
      • 1...Be8
        • 2.Sc4#
        • 2.Qxd5#
      • 1...Bg8
        • 2.Sc4#
      • 1...Sa3
        • 2.Sxf7#
        • 2.d4#
      • 1...Rxf8!
    • 1.Bd6+?
      • 1...Sxd6
        • 2.Qxd6#
      • 1...Kf6!
    • 1.Rf2?
      • threat
        • 2.Bf6#
      • 1...Sd4+
        • 2.exd4#
      • 1...Rf5
        • 2.Rxf5#
      • 1...Rh6
        • 2.Rf5#
      • 1...Bxc5!
    • 1.d4+?
      • 1...Sxd4+
        • 2.exd4#
      • 1...Ke4!
  • Keys
    • 1.Qc4!
      • threat
        • 2.Qe4#
      • 1...Sd4+
        • 2.exd4#
      • 1...Sxe3
        • 2.Sd7#
      • 1...Sxe7
        • 2.Sd7#
      • 1...Bd4
        • 2.exd4#
      • 1...Bg6
        • 2.Qxd5#
      • 1...Sbc3
        • 2.Qf4#
      • 1...Sd6
        • 2.Qf4#
      • 1...Sdc3
        • 2.Sd7#
      • 1...Sf4
        • 2.Sd7#
        • 2.exf4#
        • 2.gxf4#
      • 1...Sb6
        • 2.d4#
      • 1...Sf6
        • 2.Bd6#
      • 1...Sdc7
        • 2.Sd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 7
    • REMOVED MATES = 3
  • Sets
    • B(g);N_GUARD::QAR1(H),XS(c)
    • S(b);N_GUARD::QAB1(H)
    • S(b);CHECK,OGATE::R(A)+P(D)DCHECK,XS(b)
    • S(b);N_GUARD::QAB1(H),XS(b)
  • Tries
    • Try
      • S(K);
      • Threat
        • DUALS(2)
      • Vars
        • S(b);CHECK,OGATE::R(A)+P(D)DCHECK,XS(b)
        • S(b);OGATE,XS(K)::QAB1(H),XS(b)
        • R(e);::S(K)
        • B(g);::S(K)
      • Refutation
        • R(i);XS(L)
    • Try
      • B(J);CHECK
      • Vars
        • S(b);OGATE,XB(J)::QAB1(H),XS(b)
      • Refutation
        • K(d);N_SPINS(c),S_FLIGHT
    • Try
      • R(A);
      • Threat
        • B(J)
      • Vars
        • S(b);CHECK,OGATE::P(D),XS(b)
        • R(e);N_GUARD::R1(A),XR(e)
        • R(e);N_GUARD::R1(A)
      • Refutation
        • B(f);N_SPINS(c),XQ(H)
    • Try
      • P(C);CHECK
      • Vars
        • S(b);CHECK,OGATE,XP(C)::R(A)+P(D)DCHECK,XS(b)
      • Refutation
        • K(d);P-FLIGHT
  • Actual
    • Q(H);N_PINS(c)
    • Threat
      • QAR1(H)
    • Vars
      • S(b);CHECK,OGATE,P_SPINS(c)::R(A)+P(D)DCHECK,XS(b)
      • S(c);P_PINQ(H),P_SPINS(c),XP(D)::S(L)
      • S(c);P_PINQ(H),P_SPINS(b),XB(J)::S(L)
      • B(f);OGATE::R(A)+P(D)DCHECK,XB(f)
      • B(g);N_GUARD::QAR1(H),XS(c)
      • S(b);P_SPINS(c)::QAB1(H)
      • S(c);P_PINQ(H),P_SPINS(b)::S(L)
      • S(c);P_PINQ(H),P_SPINS(b),S_CUTB(f)::P(C)
      • S(c);P_PINQ(H),P_SPINS(b),SBLOCK::B(J)
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