MESON Chess Problem Database

Problem Display
PID: 164309 (1b6/4n2b/1r1N4/1pR2p2/1P1k4/3Pp3/4P2r/2KRn1NQ w - - 0 1)

Parcerisa, Jose Antonio Lopez

British Chess Magazine, 2017

1b6/4n2b/1r1N4/1pR2p2/1P1k4/3Pp3/4P2r/2KRn1NQ

#2

9 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Rxe2
      • 2.Sxe2#
    • 1...Ra6
      • 2.Sxb5#
    • 1...Rc6
      • 2.Sxb5#
    • 1...Sc2
      • 2.Sf3#
    • 1...Sg2
      • 2.Sf3#
    • 1...Sxd3+
      • 2.Rxd3#
    • 1...Sf3
      • 2.Sxf3#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sc6
      • 2.Qd5#
    • 1...Sg6
      • 2.Sxf5#
      • 2.Qd5#
    • 1...Sc8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
  • Tries
    • 1.Sxf5+?
      • 1...Sxf5
        • 2.Qe4#
        • 2.Qd5#
      • 1...Bxf5!
  • Keys
    • 1.Qa8!
      • threat
        • 2.Qa1#
      • 1...Sxd3+
        • 2.Rxd3#
      • 1...Rxe2
        • 2.Sxe2#
      • 1...Sd5
        • 2.Qxd5#
      • 1...Ra6
        • 2.Sxb5#
      • 1...Ba7
        • 2.Qh8#
      • 1...Sc2
        • 2.Sf3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 6
  • Sets
    • R(b);XP(E)::S(C),XR(b)
    • R(g);N_GUARD::S(I),XP(e)
    • R(g);N_GUARD,P_PINR(H)::S(I),XP(e)
    • S(a);N_GUARD::S(C)
    • S(a);CHECK,OGATE,P_SPINS(a),XP(F)::R1(B),XS(a)
    • S(a);N_GUARD::S(C),XS(a)
    • S(h);N_GUARD::QAR1(D),XS(h)
    • S(h);N_GUARD::QAR1(D)
  • Tries
    • Try
      • S(I);CHECK,XP(f)
      • Refutation
        • B(i);XS(I)
  • Actual
    • Q(D);
    • Threat
      • QAB(D)
    • Vars
      • S(a);CHECK,OGATE,P_SPINS(a),XP(F)::R1(B),XS(a)
      • R(b);XP(E)::S(C),XR(b)
      • S(h);N_GUARD::QAR1(D),XS(h)
      • R(g);N_GUARD::S(I),XP(e)
      • B(j);OGATE::QAB(D)
      • S(a);N_GUARD::S(C)
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