MESON Chess Problem Database

Problem Display
PID: 45930 (4Rb2/5p2/4p3/3p1kPK/3n1N1R/8/1B3r2/4Q3 w - - 0 1)

Vaughan, Colin V

The Problemist, 1952

4Rb2/5p2/4p3/3p1kPK/3n1N1R/8/1B3r2/4Q3

#2

7 + 7

56 The Problemist 2002

SOLUTION

  • SOUND
  • Sets
    • 1...Sc2
      • 2.Qe5#
    • 1...Se2
      • 2.Qb1#
    • 1...Sb3
      • 2.Qe5#
    • 1...Sb5
      • 2.Qe5#
    • 1...e5
      • 2.Rxe5#
      • 2.Qxe5#
  • Tries
    • 1.Sxd5?
      • threat
        • 2.Qe4#
      • 1...exd5
        • 2.Re5#
        • 2.Qe5#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Se2
        • 2.Se3#
        • 2.Qb1#
      • 1...Re2!
    • 1.Rxf8?
      • threat
        • 2.Rxf7#
      • 1...Se2
        • 2.Qb1#
      • 1...f6
        • 2.Rxf6#
      • 1...Re2!
  • Keys
    • 1.Sxe6!
      • threat
        • 2.Sxd4#
      • 1...Sxe6
        • 2.Qe5#
      • 1...fxe6
        • 2.Rxf8#
      • 1...Rd2
        • 2.Rf4#
      • 1...Rf4
        • 2.Rxf4#
      • 1...Bc5
        • 2.Sg7#
      • 1...Bg7
        • 2.Sxg7#
      • 1...Sc2
        • 2.Qxf2#
        • 2.Qe5#
      • 1...Se2
        • 2.Qb1#
      • 1...Sb3
        • 2.Qxf2#
        • 2.Qe5#
      • 1...Sf3
        • 2.Rf4#
      • 1...Sb5
        • 2.Qxf2#
        • 2.Qe5#
      • 1...Sc6
        • 2.Qxf2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 8
    • REMOVED MATES = 3
  • Sets
    • S(b);::QAR1(A)
    • S(b);N_GUARD,S_CUTR(a)::QAB(A)
  • Tries
    • Try
      • S(C);XP(c)
      • Threat
        • QAB1(A)
      • Vars
        • R(a);N_GUARD::R1(D),XR(a)
      • Refutation
        • R(a);
    • Try
      • R(G);P_PINP(f),XB(g)
      • Threat
        • R(G),XP(f)
      • Vars
        • S(b);N_GUARD,S_CUTR(a)::QAB(A)
        • P(f);OGATE::R1(G),XP(f)
      • Refutation
        • R(a);
  • Actual
    • S(C);XP(e)
    • Threat
      • S(C),XS(b)
    • Vars
      • S(b);XS(C)::QAR1(A)
      • P(f);OGATEB,XS(C)::R(G),XB(g)
      • R(a);N_GUARD::R1(D)
      • R(a);N_GUARD::R1(D),XR(a)
      • B(g);N_GUARD::S(C)
      • B(g);N_GUARD::S(C),XB(g)
      • S(b);N_GUARD,S_CUTR(a)::QAB(A)
      • S(b);S_CUTR(a)::R1(D)
      • S(b);N_GUARD::QAR(A),XR(a)
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