MESON Chess Problem Database

Problem Display
PID: 142468 (N7/8/4ppK1/QNb1k1p1/2P1p1R1/1P1r2n1/3R1P1B/7b w - - 0 1)

Markwick, Frederick W

Daily News, 1908

N7/8/4ppK1/QNb1k1p1/2P1p1R1/1P1r2n1/3R1P1B/7b

#2

10 + 9

14867 BCPS Library 2011
15351 SCPF/BCPS Black Books 2015

SOLUTION

  • SOUND
  • Sets
    • 1...Rxd2
      • 2.Bxg3#
    • 1...Rd4
      • 2.Bxg3#
    • 1...Rd5
      • 2.Bxg3#
    • 1...Rd6
      • 2.Bxg3#
    • 1...Rd7
      • 2.Bxg3#
    • 1...Rd8
      • 2.Bxg3#
    • 1...Bf3
      • 2.Bxg3#
    • 1...Bd4
      • 2.Qc7#
    • 1...e3
      • 2.Bxg3#
  • Tries
    • 1.Rxd3?
      • threat
        • 2.Bxg3#
      • 1...Bxf2
        • 2.Qc7#
      • 1...Be3
        • 2.Qc7#
      • 1...f5!
    • 1.Qc7+?
      • 1...Rd6
        • 2.Bxg3#
      • 1...Bd6!
    • 1.Qa1+?
      • 1...Rc3
        • 2.Bxg3#
      • 1...Rd4
        • 2.Bxg3#
      • 1...Bd4!
    • 1.f4+?
      • 1...exf4 ep
        • 2.Bxg3#
      • 1...gxf4!
  • Keys
    • 1.Sd4!
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Qa1#
      • 1...Kd6
        • 2.Qc7#
      • 1...Rxd4
        • 2.Bxg3#
      • 1...e3
        • 2.Bxg3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(b);N_GUARD,XR(A)::B(C),XS(c)
    • R(b);N_GUARD::B(C),XS(c)
    • B(a);S_CUTR(b)::B(C),XS(c)
    • B(e);N_GUARD,S_CUTR(b)::QAB(G)
    • P(d);S_CUTR(b)::B(C),XS(c)
  • Tries
    • Try
      • R(A);XR(b)
      • Threat
        • B(C),XS(c)
      • Vars
        • B(e);N_GUARD,XP(B)::QAB(G)
        • B(e);N_GUARD::QAB(G)
      • Refutation
        • P(i);
    • Try
      • Q(G);CHECK
      • Vars
        • R(b);P_SPINR(b)::B(C),XS(c)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • Q(G);CHECK
      • Vars
        • R(b);P_SPINR(b)::B(C),XS(c)
      • Refutation
        • B(e);P_SPINB(e)
    • Try
      • P(B);CHECK,N_PINS(c)
      • Vars
        • P(d);EP,P_SPINS(c),S_CUTP(g),XP(B)::B(C),XS(c)
      • Refutation
        • P(g);XP(B)
  • Actual
    • S(H);P_PINB(e)
    • Threat
      • QAR2(G),XB(e)
    • Vars
      • K(f);N_SPINB(e),N_SPINS(c),OGATEB,P_SPINP(d),P_SPINR(b),S_FLIGHT,XS(H)::QAB(G)
      • K(f);N_SPINB(e),S_FLIGHT::QAB1(G)
      • R(b);N_GUARD,XS(H)::B(C),XS(c)
      • P(d);S_CUTR(b)::B(C),XS(c)
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