MESON Chess Problem Database

Problem Display
PID: 24930 (8/2Q5/4p1B1/r2k3K/3P4/2n5/3R1P2/8 w - - 0 1)

Mansfield, Comins

Decalet, 1943

8/2Q5/4p1B1/r2k3K/3P4/2n5/3R1P2/8

#2

6 + 4

3550 Complete Mansfield/II 1997
5454 Near Snap 2017

SOLUTION

  • SOUND
  • Sets
    • 1...Ra1
      • 2.Qc5#
    • 1...Ra2
      • 2.Qc5#
    • 1...Ra3
      • 2.Qc5#
    • 1...Ra4
      • 2.Qc5#
    • 1...Rc5
      • 2.Qxc5#
    • 1...Ra6
      • 2.Qc5#
    • 1...Ra7
      • 2.Qc5#
    • 1...Ra8
      • 2.Qc5#
    • 1...Sb5
      • 2.Qc5#
  • Tries
    • 1.f3?
      • 1...Rc5
        • 2.Qxc5#
      • 1...e5
        • 2.Bf7#
      • 1...Ra1
        • 2.Qc5#
      • 1...Ra2
        • 2.Qc5#
      • 1...Ra3
        • 2.Qc5#
      • 1...Ra4
        • 2.Qc5#
      • 1...Ra6
        • 2.Qc5#
      • 1...Ra7
        • 2.Qc5#
      • 1...Ra8
        • 2.Qc5#
      • 1...Sb1
        • 2.Be4#
      • 1...Sd1
        • 2.Be4#
      • 1...Sa2
        • 2.Be4#
      • 1...Se2
        • 2.Be4#
      • 1...Sa4
        • 2.Be4#
      • 1...Se4
        • 2.Bxe4#
        • 2.fxe4#
      • 1...Sb5
        • 2.Be4#
        • 2.Qc5#
      • 1...Rb5!
  • Keys
    • 1.Bd3!
      • threat
        • 2.Qd7#
      • 1...Kxd4+
        • 2.Bf5#
      • 1...Ra6
        • 2.Qc5#
      • 1...Ra7
        • 2.Qc5#
      • 1...Se4
        • 2.Bc4#
      • 1...Sb5
        • 2.Qc5#

Anticipated by 68782(1926)

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 6
  • Sets
    • R(b);N_GUARD::QAR1(F)
    • R(b);N_GUARD::QAR1(F),XR(b)
    • S(a);S_CUTR(b)::QAR1(F)
  • Tries
    • Try
      • P(B);
      • Vars
        • R(b);N_GUARD::QAR1(F),XR(b)
        • P(d);OGATEB::B(E)
        • R(b);N_GUARD::QAR1(F)
        • S(a);N_GUARD::B(E)
      • Refutation
        • R(b);
  • Actual
    • B(E);
    • Threat
      • QAR2(F)
    • Vars
      • K(c);CHECK,OGATEB,P-FLIGHT,XP(C)::R(A)+B(E)
      • R(b);N_GUARD::QAR1(F)
      • S(a);SBLOCK::B(E)
      • S(a);S_CUTR(b)::QAR1(F)
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