MESON Chess Problem Database

Problem Display
PID: 157125 (4r3/3r4/1Bp2N1b/1R6/QPk5/8/bKPp4/3B1N2 w - - 0 1)

Petite, Efren

Best Problems, 2007

4r3/3r4/1Bp2N1b/1R6/QPk5/8/bKPp4/3B1N2

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rc5#
    • 1...c5
      • 2.bxc5#
  • Tries
    • 1.Be2+?
      • 1...Rd3
        • 2.Bxd3#
        • 2.cxd3#
      • 1...Rxe2!
    • 1.Ra5?
      • threat
        • 2.b5#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bf8!
    • 1.Re5?
      • threat
        • 2.b5#
      • 1...Ra7
        • 2.Be2#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bf8
        • 2.Se3#
      • 1...Ra8!
    • 1.Rg5?
      • threat
        • 2.b5#
      • 1...Ra7
        • 2.Sxd2#
      • 1...Ra8
        • 2.Se3#
      • 1...Bb3
        • 2.Qxb3#
      • 1...Bf8!
  • Keys
    • 1.Rd5!
      • threat
        • 2.b5#
      • 1...Ra7
        • 2.Rd4#
      • 1...Ra8
        • 2.Be2#
      • 1...Bb3
        • 2.Qxb3#
        • 2.cxb3#
      • 1...Bf8
        • 2.Sxd2#

This is a version of 168240

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • R(f);SBLOCK::R1(G)
    • P(d);OGATE::QAR(E)+P(F),XP(d)
  • Tries
    • Try
      • B(A);CHECK
      • Refutation
        • R(g);XB(A)
    • Try
      • R(G);
      • Threat
        • QAR(E)+P(F)
      • Vars
        • B(a);N_GUARD::QAB1(E),XB(a)
      • Refutation
        • B(e);
    • Try
      • R(G);
      • Threat
        • QAR(E)+P(F)
      • Vars
        • R(f);N_GUARD::B(A)
        • B(a);N_GUARD::QAB1(E),XB(a)
        • B(e);N_GUARD::S(B)
      • Refutation
        • R(g);
    • Try
      • R(G);
      • Threat
        • QAR(E)+P(F)
      • Vars
        • R(f);N_GUARD::S(B),XP(b)
        • R(g);N_GUARD::S(B)
        • B(a);N_GUARD::QAB1(E),XB(a)
      • Refutation
        • B(e);
  • Actual
    • R(G);
    • Threat
      • QAR(E)+P(F)
    • Vars
      • R(f);N_GUARD::R1(G)
      • R(g);N_GUARD::B(A)
      • B(e);N_GUARD::S(B),XP(b)
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