MESON Chess Problem Database

Problem Display
PID: 89227 (3R4/B3p1K1/1N1q1P2/2n2p2/2Pk2p1/b1p5/1r1PQ3/N2n1B2 w - - 0 1)

Swindley, Cyril P

The Problemist, 1975

3R4/B3p1K1/1N1q1P2/2n2p2/2Pk2p1/b1p5/1r1PQ3/N2n1B2

#2

10 + 10

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qd5
      • 2.Rxd5#
    • 1...Rb1
      • 2.Sc2#
    • 1...Rc2
      • 2.Sxc2#
    • 1...Rb3
      • 2.Sc2#
    • 1...Rb4
      • 2.Sc2#
    • 1...Rb5
      • 2.Sc2#
    • 1...Rxb6
      • 2.Sc2#
    • 1...Sf2
      • 2.Qe3#
    • 1...Se3
      • 2.Qxe3#
    • 1...exf6
      • 2.Rxd6#
    • 1...e5
      • 2.Rxd6#
    • 1...e6
      • 2.Rxd6#
  • Keys
    • 1.Sd7!
      • threat
        • 2.Qd3#
      • 1...Qxf6+
        • 2.Sxf6#
      • 1...Qxd7
        • 2.Rxd7#
      • 1...Rxd2
        • 2.Sb3#
      • 1...Qg3
        • 2.Se5#
      • 1...Qb6
        • 2.Qe5#
      • 1...Rb6
        • 2.Sc2#
      • 1...Sf2
        • 2.Qe3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 10
  • Sets
    • Q(i);OGATE::R1(J),XQ(i)
    • R(b);N_GUARD::S(A)
    • R(b);N_GUARD::S(A),XR(b)
    • R(b);N_GUARD,XS(F)::S(A)
    • S(a);N_GUARD::QAB1(D)
    • S(a);N_GUARD::QAB1(D),XS(a)
    • P(j);N_GUARD,XP(G)::R(J),XQ(i)
    • P(j);N_GUARD::R(J),XQ(i)
  • Actual
    • S(F);N_PINQ(i),P_PINS(g)
    • Threat
      • QAR1(D)
    • Vars
      • Q(i);CHECK,XP(G)::R(J)+S(F),XQ(i)
      • Q(i);OGATE,P_SPINQ(i),XS(F)::R(J),XQ(i)
      • R(b);N_GUARD,XP(C)::S(A)
      • Q(i);::R(J)+S(F)
      • Q(i);N_GUARD,N_SPINS(g)::QAB1(D)
      • R(b);N_GUARD,N_SPINS(g)::S(A)
      • S(a);N_GUARD::QAB1(D)
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