MESON Chess Problem Database

Problem Display
PID: 55542 (q2b4/pb1Pp2K/3p1NR1/4k1p1/R5P1/7n/BP6/Q7 w - - 0 1)

Mansfield, Comins

Comm., diagrammes, 1975

q2b4/pb1Pp2K/3p1NR1/4k1p1/R5P1/7n/BP6/Q7

#2

9 + 9

4054 Complete Mansfield/III 1999

SOLUTION

  • SOUND
  • Sets
    • 1...Sf4
      • 2.b4#
    • 1...e6
      • 2.b3#
  • Tries
    • 1.Se8?
      • threat
        • 2.Re6#
      • 1...Bd5
        • 2.b3#
      • 1...Sf4
        • 2.Rxg5#
      • 1...d5
        • 2.Qe1#
      • 1...e6
        • 2.Rxe6#
      • 1...Be4!
    • 1.Sg8?
      • threat
        • 2.Re6#
      • 1...Bd5
        • 2.b3#
      • 1...Sf4
        • 2.Rxg5#
      • 1...d5
        • 2.Qe1#
      • 1...e6
        • 2.Rxe6#
      • 1...Be4!
    • 1.Rxg5+?
      • 1...Kxf6
        • 2.Rf5#
      • 1...Sxg5+!
  • Keys
    • 1.Sh5!
      • threat
        • 2.Re6#
      • 1...Be4
        • 2.b4#
      • 1...Bd5
        • 2.b3#
      • 1...Sf4
        • 2.Rxg5#
      • 1...d5
        • 2.Qe1#
      • 1...e6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(a);SBLOCK::QAB(A)+P(C)
    • P(g);SBLOCK::QAB(A)+P(C)
  • Tries
    • Try
      • S(F);
      • Threat
        • R1(G)
      • Vars
        • B(f);SBLOCK::QAB(A)+P(C)
        • S(a);N_GUARD::R(G),XP(c)
        • P(d);S_CUTB(f)::QAR(A)
        • P(g);::R1(G),XP(g)
      • Refutation
        • B(f);P_PINR(G)
    • Try
      • S(F);
      • Threat
        • R1(G)
      • Vars
        • B(f);SBLOCK::QAB(A)+P(C)
        • S(a);N_GUARD::R(G),XP(c)
        • P(d);S_CUTB(f)::QAR(A)
        • P(g);::R1(G),XP(g)
      • Refutation
        • B(f);P_PINR(G)
    • Try
      • R(G);CHECK,XP(c)
      • Vars
        • K(b);S_FLIGHT,XS(F)::R1(G)
      • Refutation
        • S(a);CHECK,XR(G)
  • Actual
    • S(F);
    • Threat
      • R1(G)
    • Vars
      • B(f);P_PINR(G),SBLOCK::QAB(A)+P(C)
      • B(f);SBLOCK::QAB(A)+P(C)
      • S(a);N_GUARD::R(G),XP(c)
      • P(d);S_CUTB(f)::QAR(A)
      • P(g);::R1(G),XP(g)
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