MESON Chess Problem Database

Problem Display
PID: 262 (2n5/2N5/4pK2/Q1p2n2/2k3BR/PbBrp3/2p5/8 w - - 0 1)

Mansfield, Comins

The Observer, 1950

(First published on Sun Nov 5 1950)

2n5/2N5/4pK2/Q1p2n2/2k3BR/PbBrp3/2p5/8

#2

7 + 9

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Be2#
    • 1...Rd2
      • 2.Be2#
    • 1...Rxc3
      • 2.Be2#
      • 2.Bxf5#
    • 1...Rd4
      • 2.Be2#
    • 1...Rd5
      • 2.Be2#
    • 1...Rd6
      • 2.Be2#
    • 1...Rd7
      • 2.Be2#
    • 1...Rd8
      • 2.Be2#
    • 1...Sg3
      • 2.Bxe6#
    • 1...Sd4
      • 2.Bxe6#
    • 1...Sfd6
      • 2.Bxe6#
    • 1...Sh6
      • 2.Bxe6#
    • 1...Sfe7
      • 2.Be2#
      • 2.Bxe6#
    • 1...Sg7
      • 2.Be2#
      • 2.Bxe6#
  • Keys
    • 1.Bd4!
      • threat
        • 2.Qxc5#
      • 1...Kxd4
        • 2.Bxf5#
      • 1...Rxd4
        • 2.Be2#
      • 1...Sxd4
        • 2.Bxe6#
      • 1...cxd4
        • 2.Qb4#
      • 1...Rd1
        • 2.Qc3#
      • 1...Rd2
        • 2.Qc3#
      • 1...Rc3
        • 2.Qxc3#
      • 1...Ba2
        • 2.Qa4#
      • 1...Ba4
        • 2.Qxa4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 5
    • REMOVED MATES = 7
  • Sets
    • R(c);::R(D)+B(C),DCHECK
    • R(c);S_CUTS(g),S_CUTS(g)::B(C)
    • S(g);OGATE::R(D)+B(C),DCHECK,XP(h)
    • S(g);OGATE::B(C),XP(h)
  • Actual
    • B(B);
    • Threat
      • QAR1(E),XP(f)
    • Vars
      • K(e);OGATEB,P-FLIGHT,XB(B)::R(D)+B(C),XS(g)
      • R(c);OGATEB,XB(B)::B(C)
      • S(g);OGATE,XB(B)::B(C),XP(h)
      • P(f);N_GUARD,SBLOCK,XB(B)::QAR1(E)
      • R(c);N_GUARD::QAR1(E)
      • R(c);N_GUARD::QAR1(E),XR(c)
      • B(b);N_GUARD::QAR2(E)
      • B(b);N_GUARD::QAR2(E),XB(b)
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