MESON Chess Problem Database

Problem Display
PID: 210196 (4B3/4R3/b1PkpPRb/1p1p4/nK2Pr2/5N2/3Qp2B/8 w - - 0 1)

Larsen, Lars Aksglade (= Aksglade, Lars)

Deutsche Schachblatter, 1974

4B3/4R3/b1PkpPRb/1p1p4/nK2Pr2/5N2/3Qp2B/8

#2

10 + 9

15148 Sadier Collection 2020

SOLUTION

  • SOUND
  • Sets
    • 1...d4
      • 2.Qxd4#
    • 1...e5
      • 2.Qxd5#
  • Tries
    • 1.Sg5?
      • threat
        • 2.Sf7#
      • 1...Ke5
        • 2.Bxf4#
        • 2.Rxe6#
        • 2.Qxd5#
      • 1...Bxg5!
    • 1.Bxf4+?
      • 1...e5
        • 2.Bxe5#
        • 2.Qxd5#
      • 1...Bxf4!
    • 1.Rxe6+?
      • 1...Kxe6
        • 2.Qxd5#
      • 1...Kc7!
    • 1.Qc3?
      • threat
        • 2.Rd7#
        • 2.Qe5#
      • 1...e1Q
        • 2.Rd7#
      • 1...e1B
        • 2.Rd7#
      • 1...Bc8
        • 2.Qe5#
      • 1...Sc5
        • 2.Qe5#
        • 2.Qxc5#
      • 1...Sb6
        • 2.Qe5#
        • 2.Qc5#
      • 1...d4
        • 2.Rd7#
        • 2.Qxd4#
      • 1...e5
        • 2.Qxe5#
      • 1...Sxc3!
    • 1.Qxf4+?
      • 1...e5
        • 2.Qxe5#
      • 1...Bxf4!
  • Keys
    • 1.Se5!
      • threat
        • 2.Sf7#
      • 1...Rxe4+
        • 2.Sc4#
      • 1...Kxe5
        • 2.Qxd5#
      • 1...Rxf6
        • 2.Rd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • P(e);N_PINP(E),OGATEB::QAR2(A),XP(e)
    • P(h);N_GUARD,N_SPINR(c)::QAR1(A),XP(e)
  • Tries
    • Try
      • S(C);
      • Threat
        • S(C)
      • Refutation
        • B(i);XS(C)
    • Try
      • B(B);CHECK,N_SPINP(E),XR(c)
      • Refutation
        • B(i);XB(B)
    • Try
      • R(I);CHECK,XP(h)
      • Vars
        • K(g);N_SPINP(e),N_SPINR(c),P-FLIGHT,XR(I)::QAB1(A),XP(e)
      • Refutation
        • K(g);N_SPINP(e),S_FLIGHT
    • Try
      • Q(A);N_PINP(e)
      • Threat
        • DUALS(2)
      • Vars
        • P(a);P_PINQ(A)::R1(I)
        • B(f);::QAB1(A)
        • P(h);N_SPINR(c)::QAB1(A),XP(h)
      • Refutation
        • S(b);XQ(A)
    • Try
      • Q(A);CHECK,N_PINP(e),N_SPINP(E),XR(c)
      • Vars
        • P(h);P_SPINP(h)::QAB1(A),XP(h)
      • Refutation
        • B(i);P_SPINB(i),XQ(A)
  • Actual
    • S(C);N_PINR(c)
    • Threat
      • S(C)
    • Vars
      • R(c);CHECK,XP(E)::B(B)+S(C),DCHECK
      • K(g);N_SPINP(e),P_SPINP(h),P_SPINR(c),S_FLIGHT,XS(C)::QAR1(A),XP(e)
      • R(c);N_PINP(E),XP(G)::R1(I)
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