MESON Chess Problem Database

Problem Display
PID: 269467 (2n2Q1b/1K3P1b/1pP5/1BR3N1/3k1pN1/5rp1/2P1Pn2/4r1B1 w - - 0 1)

Nicklin, John Joseph

The Observer, 1958

(First published on Sun Mar 30 1958)

2n2Q1b/1K3P1b/1pP5/1BR3N1/3k1pN1/5rp1/2P1Pn2/4r1B1

#2

11 + 10

17397 Ling Notebooks 2023

SOLUTION

  • SOUND
  • Sets
    • 1...Bd3
      • 2.c3#
    • 1...Be4
      • 2.Se6#
    • 1...Sd6+
      • 2.Qxd6#
    • 1...Sa7
      • 2.Qd6#
  • Tries
    • 1.Bxf2+?
      • 1...Rxf2
        • 2.c3#
      • 1...Re3
        • 2.c3#
      • 1...gxf2!
    • 1.Qd8+?
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Kxc5!
  • Keys
    • 1.e4!
      • threat
        • 2.Rc4#
      • 1...Sd6+
        • 2.Qxd6#
      • 1...Rxe4
        • 2.Sxf3#
      • 1...Bxe4
        • 2.Se6#
      • 1...bxc5
        • 2.Qxh8#
      • 1...fxe4 ep
        • 2.c3#
      • 1...Rc3
        • 2.Rd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • B(h);S_CUTR(c)::P(B)
    • B(h);P_PINP(H),SBLOCK::S(G)
    • S(i);CHECK,N_GUARD::QAR2(K),XS(i)
    • S(i);N_GUARD::QAR2(K)
  • Tries
    • Try
      • B(A);CHECK,XS(b)
      • Vars
        • R(c);XB(A)::P(B)
        • R(c);P_SPINR(c)::P(B)
      • Refutation
        • P(d);XB(A)
    • Try
      • Q(K);CHECK
      • Vars
        • S(i);CHECK,N_GUARD::QAR2(K),XS(i)
      • Refutation
        • K(e);S_FLIGHT,XR(F)
  • Actual
    • P(C);
    • Threat
      • R1(F)
    • Vars
      • S(i);CHECK,N_GUARD::QAR2(K),XS(i)
      • R(a);SBLOCK,XP(C)::S(G),XR(c)
      • B(h);P_PINP(H),SBLOCK,XP(C)::S(G)
      • P(g);SBLOCK,XR(F)::QAB(K),XB(j)
      • P(f);EP,N_SPINS(b),S_CUTR(c),XP(C)::P(B)
      • R(c);SBLOCK::R1(F)
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