MESON Chess Problem Database

Problem Display
PID: 186724 (3nn3/7Q/4p3/2R1N1N1/1P1kPr2/K5B1/bP3Pp1/2r3q1 w - - 0 1)

Stanley, Cyril (Kipping, Cyril Stanley)

Chess, 1960

3nn3/7Q/4p3/2R1N1N1/1P1kPr2/K5B1/bP3Pp1/2r3q1

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Rc3+
      • 2.bxc3#
    • 1...Rf3+
      • 2.Sgxf3#
    • 1...Rxe4
      • 2.Sgf3#
      • 2.Qxe4#
    • 1...Rg4
      • 2.Sgf3#
    • 1...Rh4
      • 2.Sgf3#
  • Tries
    • 1.Bxf4?
      • threat
        • 2.Sgf3#
        • 2.Be3#
      • 1...Rc3+
        • 2.bxc3#
      • 1...Rxc5
        • 2.Sgf3#
      • 1...Qd1
        • 2.Be3#
      • 1...Qe1
        • 2.Sgf3#
      • 1...Re1
        • 2.Sgf3#
      • 1...Bd5
        • 2.Sgf3#
      • 1...Qxf2!
  • Keys
    • 1.Qa7!
      • threat
        • 2.Rd5#
      • 1...Rc3+
        • 2.bxc3#
      • 1...Rf3+
        • 2.Rc3#
      • 1...Rxc5
        • 2.Qxc5#
      • 1...Rxe4
        • 2.Sgf3#
      • 1...Bd5
        • 2.Rxd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(a);CHECK,OGATE::P(A),XR(a)
    • R(f);CHECK,N_GUARD::S(I),XR(f)
    • R(f);N_GUARD::S(I)
  • Tries
    • Try
      • B(D);XR(f)
      • Threat
        • DUALS(2)
      • Vars
        • R(a);CHECK,OGATE::P(A),XR(a)
        • R(a);XR(G)::S(I)
        • Q(b);::B(D)
        • Q(b);::S(I)
        • R(a);::S(I)
        • B(c);::S(I)
      • Refutation
        • Q(b);XP(B)
  • Actual
    • Q(J);
    • Threat
      • QAB(J)+R(G),DCHECK
    • Vars
      • R(a);CHECK,OGATE::P(A),XR(a)
      • R(f);CHECK::QAB(J)+R(G)
      • R(a);OGATE,P_SPINR(a),XR(G)::QAB1(J),XR(a)
      • R(f);N_GUARD,SBLOCK,XP(F)::S(I)
      • B(c);::QAB(J)+R(G),DCHECK,XB(c)
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