MESON Chess Problem Database

Problem Display
PID: 263 (1K6/3N4/3RQ3/2BP4/P1kp4/6nR/3P2bq/b2B4 w - - 0 1)

Mansfield, Comins

The Observer, 1950

(First published on Sun May 28 1950)

1K6/3N4/3RQ3/2BP4/P1kp4/6nR/3P2bq/b2B4

#2

10 + 6

3550 Complete Mansfield/II 1997
15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Kd3
      • 2.Qe2#
    • 1...Sf1
      • 2.Bb3#
    • 1...Sh1
      • 2.Bb3#
    • 1...Se2
      • 2.Bb3#
    • 1...Se4
      • 2.Bb3#
    • 1...Sf5
      • 2.Bb3#
    • 1...Sh5
      • 2.Bb3#
  • Tries
    • 1.Sb6+?
      • 1...Kd3
        • 2.Qe2#
      • 1...Kxc5!
    • 1.Ba3?
      • threat
        • 2.Se5#
      • 1...Kd3
        • 2.Qe2#
      • 1...Sf1
        • 2.Sb6#
        • 2.Bb3#
      • 1...Sh1
        • 2.Sb6#
        • 2.Bb3#
      • 1...Se2
        • 2.Sb6#
        • 2.Bb3#
      • 1...Se4
        • 2.Sb6#
        • 2.Bb3#
      • 1...Sf5
        • 2.Sb6#
        • 2.Bb3#
      • 1...Sh5
        • 2.Sb6#
        • 2.Bb3#
      • 1...d3!
    • 1.Qe2+?
      • 1...Sxe2
        • 2.Bb3#
      • 1...d3!
    • 1.Qe3?
      • threat
        • 2.Bb3#
        • 2.Qb3#
      • 1...d3
        • 2.Sb6#
      • 1...Bc3
        • 2.d3#
      • 1...dxe3!
  • Keys
    • 1.Rc6!
      • threat
        • 2.Se5#
      • 1...Sf1+
        • 2.Bd6#
      • 1...Sh1+
        • 2.Bd6#
      • 1...Se2+
        • 2.Bd6#
      • 1...Se4+
        • 2.d6#
      • 1...Sf5+
        • 2.Bd6#
      • 1...Sh5+
        • 2.Bd6#
      • 1...Kd3
        • 2.Qe2#
      • 1...d3
        • 2.Sb6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 6
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • K(e);P_SPINS(d),S_FLIGHT::QAB1(H)
    • S(d);P_PINR(G)::B(A)
  • Tries
    • Try
      • S(I);CHECK
      • Vars
        • K(e);P_SPINS(d),S_FLIGHT::QAB1(H)
      • Refutation
        • K(e);P-FLIGHT,XB(E)
    • Try
      • B(E);
      • Threat
        • S(I)
      • Vars
        • K(e);P_SPINS(d),S_FLIGHT::QAB1(H)
      • Refutation
        • P(f);
    • Try
      • Q(H);CHECK
      • Vars
        • S(d);P_PINR(G),XQ(H)::B(A)
      • Refutation
        • P(f);P_SPINP(f)
    • Try
      • Q(H);
      • Threat
        • DUALS(2)
      • Vars
        • P(f);::S(I)
        • B(a);SBLOCK::P(B)
      • Refutation
        • P(f);XQ(H)
  • Actual
    • R(G);
    • Threat
      • S(I)
    • Vars
      • S(d);CHECK::R(G)+B(E)
      • S(d);CHECK,S_CUTB(b)::QAB(H)+P(F)
      • K(e);P_SPINS(d),S_FLIGHT::QAB1(H)
      • P(f);SBLOCK::S(I)
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