MESON Chess Problem Database

Problem Display
PID: 132150 (2r5/3r4/4pbQ1/1N4R1/5Pp1/4B3/1n2kPK1/1B5R w - - 0 1)

Casa, Alex

2nd HM., Themes-64, 1967

2r5/3r4/4pbQ1/1N4R1/5Pp1/4B3/1n2kPK1/1B5R

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...g3
      • 2.Qh5#
  • Tries
    • 1.Bf5?
      • threat
        • 2.Bxg4#
      • 1...g3
        • 2.Bg4#
        • 2.Qh5#
      • 1...exf5!
    • 1.Rc5?
      • threat
        • 2.Qxg4#
      • 1...Rg7
        • 2.Qc2#
      • 1...Bg5
        • 2.Sc3#
      • 1...g3
        • 2.Qh5#
        • 2.Qg4#
      • 1...Rg8!
    • 1.Re5?
      • threat
        • 2.Qxg4#
      • 1...Rg7
        • 2.Sd4#
      • 1...Rg8
        • 2.Sc3#
      • 1...Bg5
        • 2.Bc1#
      • 1...g3
        • 2.Qh5#
        • 2.Qg4#
      • 1...Rc2!
    • 1.Qc2+?
      • 1...Rd2
        • 2.Qxd2#
      • 1...Rxc2!
  • Keys
    • 1.Rd5!
      • threat
        • 2.Qxg4#
      • 1...Rg7
        • 2.Rd2#
      • 1...Rg8
        • 2.Qc2#
      • 1...Bg5
        • 2.Sd4#
      • 1...g3
        • 2.Qh5#
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 1
  • Sets
    • P(c);OGATEB::QAB(I)
  • Tries
    • Try
      • B(A);
      • Threat
        • B(A),XP(c)
      • Refutation
        • P(d);XB(A)
    • Try
      • R(H);
      • Threat
        • QAB(I),XP(c)
      • Vars
        • R(f);N_GUARD::QAR2(I)
        • B(e);N_GUARD::S(G)
      • Refutation
        • R(g);
    • Try
      • R(H);
      • Threat
        • QAB(I),XP(c)
      • Vars
        • R(f);N_GUARD::S(G)
        • R(g);N_GUARD::S(G)
        • B(e);N_GUARD::R(H)+B(E)
      • Refutation
        • R(g);
    • Try
      • Q(I);CHECK
      • Vars
        • R(f);N_GUARD,P_SPINR(f)::QAR1(I),XR(f)
      • Refutation
        • R(g);XQ(I)
  • Actual
    • R(H);
    • Threat
      • QAB(I),XP(c)
    • Vars
      • R(f);N_GUARD::R1(H)
      • R(g);N_GUARD::QAR2(I)
      • B(e);N_GUARD::S(G)
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