MESON Chess Problem Database

Problem Display
PID: 249709 (B7/1q6/4N1n1/3rP2r/1nPBk1P1/3Np3/2bb1RPp/5Q1K w - - 0 1)

Lommer, Harold M

Illustrated London News, 1927

(First published on Sat Dec 17 1927)

B7/1q6/4N1n1/3rP2r/1nPBk1P1/3Np3/2bb1RPp/5Q1K

#2

11 + 10

15601 Albrecht-Leiss-Degener Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qa6
      • 2.Sdc5#
    • 1...Qd7
      • 2.Sdc5#
    • 1...Qf7
      • 2.Sdc5#
    • 1...Qg7
      • 2.Sdc5#
    • 1...Qh7
      • 2.Sdc5#
    • 1...Qb8
      • 2.Sdc5#
    • 1...Rxd4
      • 2.Sec5#
    • 1...Rc5
      • 2.Sdxc5#
    • 1...Rd6
      • 2.Sdc5#
    • 1...Rd7
      • 2.Sdc5#
    • 1...Rd8
      • 2.Sdc5#
    • 1...Sf4
      • 2.Rxf4#
    • 1...Sh4
      • 2.Rf4#
    • 1...Sxe5
      • 2.Rf4#
    • 1...Se7
      • 2.Rf4#
    • 1...Sf8
      • 2.Rf4#
    • 1...Sh8
      • 2.Rf4#
    • 1...exf2
      • 2.Sxf2#
  • Tries
    • 1.Rxd2?
      • threat
        • 2.Qf3#
      • 1...Sxe5
        • 2.Qf4#
      • 1...Qf7
        • 2.Sdc5#
      • 1...Rh3
        • 2.Qf5#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Sh4
        • 2.Qf4#
      • 1...Bd1!
  • Keys
    • 1.Re2!
      • threat
        • 2.Sf2#
      • 1...Kxd3
        • 2.Rxe3#
      • 1...Rxd4
        • 2.Sec5#
      • 1...Bxd3
        • 2.Qf3#
      • 1...Sxd3
        • 2.Qf3#
      • 1...Qf7
        • 2.Sdc5#
      • 1...Rf5
        • 2.Qxf5#
      • 1...Be1
        • 2.Rxe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 16
  • Sets
    • Q(j);P_SPINR(g)::S(E)
    • R(g);N_GUARD,P_SPINQ(j),SBLOCK,XB(G)::S(J)
    • R(g);N_GUARD,P_SPINQ(j)::S(E),XR(g)
    • R(g);N_GUARD,P_SPINQ(j)::S(E)
    • S(i);N_GUARD::R1(C),XS(i)
    • S(i);N_GUARD::R1(C)
    • S(i);N_GUARD,XP(I)::R1(C)
    • P(d);XR(C)::S(E),XP(d)
  • Tries
    • Try
      • R(C);XB(b)
      • Threat
        • QAB1(A)
      • Vars
        • S(i);N_GUARD,XP(I)::QAR1(A)
        • Q(j);P_SPINR(g)::S(E)
        • R(h);N_GUARD::QAB1(A)
        • R(h);N_GUARD::QAB1(A),XR(h)
        • S(i);N_GUARD::QAR1(A)
      • Refutation
        • B(a);
  • Actual
    • R(C);P_PINP(d)
    • Threat
      • S(E)
    • Vars
      • K(f);N_SPINP(d),S_FLIGHT,XS(E)::QAB(A)+R(C),DCHECK,XP(d)
      • R(g);N_GUARD,P_SPINQ(j),SBLOCK,XB(G)::S(J)
      • B(a);SBLOCK,XS(E)::QAB1(A)
      • S(e);SBLOCK,XS(E)::QAB1(A)
      • Q(j);P_SPINR(g)::S(E)
      • R(h);N_GUARD::QAB1(A),XR(h)
      • B(b);N_GUARD::R1(C),XP(d)
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