MESON Chess Problem Database

Problem Display
PID: 16997 (8/8/Np6/1R6/krn1QK2/NR6/P7/8 w - - 0 1)

Mansfield, Comins

Chess Correspondent (Meredith Ty.), 1945

8/8/Np6/1R6/krn1QK2/NR6/P7/8

#2

7 + 4

3550 Complete Mansfield/II 1997

SOLUTION

  • SOUND
  • Sets
    • 1...Sb2
      • 2.Qxb4#
    • 1...Sd2
      • 2.Qxb4#
    • 1...Sxa3
      • 2.R3xb4#
      • 2.Qxb4#
    • 1...Se3
      • 2.Qxb4#
    • 1...Sa5
      • 2.R5xb4#
      • 2.Qxb4#
    • 1...Se5
      • 2.Qxb4#
    • 1...Sd6
      • 2.Qxb4#
  • Tries
    • 1.Ra5+?
      • 1...Sxa5
        • 2.Qxb4#
      • 1...bxa5
        • 2.Sc5#
      • 1...Kxa5!
    • 1.Qd3?
      • threat
        • 2.R3xb4#
      • 1...Rxb3
        • 2.Qxb3#
      • 1...Rxb5!
    • 1.Qd5?
      • threat
        • 2.R5xb4#
      • 1...Rxb5
        • 2.Qxb5#
      • 1...Rxb3!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Sc5#
      • 1...Sb2+
        • 2.Sxb4#
      • 1...Sd2+
        • 2.Sxb4#
      • 1...Sxa3+
        • 2.R3xb4#
      • 1...Se3+
        • 2.Sxb4#
      • 1...Sa5+
        • 2.R5xb4#
      • 1...Se5+
        • 2.Sxb4#
      • 1...Sd6+
        • 2.Sxb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 5
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • S(c);OGATE,P_PINQ(D),P_SPINR(b)::QAR1(D),XR(b)
  • Tries
    • Try
      • R(F);CHECK
      • Vars
        • S(c);OGATE,P_PINQ(D),P_SPINR(b),XR(F)::QAR1(D),XR(b)
        • P(d);SBLOCK,XR(F)::S(G)
      • Refutation
        • K(a);P-FLIGHT,XR(F)
    • Try
      • Q(D);
      • Threat
        • R1(C),XR(b)
      • Vars
        • R(b);OGATE,XR(C)::QAB1(D),XR(b)
      • Refutation
        • R(b);XR(F)
    • Try
      • Q(D);
      • Threat
        • R1(F),XR(b)
      • Vars
        • R(b);OGATE,XR(F)::QAB1(D),XR(b)
      • Refutation
        • R(b);XR(C)
  • Actual
    • Q(D);
    • Threat
      • QAR(D)+S(G),DCHECK
    • Vars
      • S(c);CHECK,N_GUARD::QAR(D)+S(G),XR(b)
      • S(c);CHECK,SBLOCK,XS(B)::R1(C),XR(b)
      • S(c);CHECK,SBLOCK::R1(F),XR(b)
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