MESON Chess Problem Database

Problem Display
PID: 55654 (1rN4B/1p4Q1/3p1K2/3p3R/4p2P/p1p5/Pk4pr/bB4R1 w - - 0 1)

Petite, Efren

Het Belgisch Schaakbord (L'Echiquier Belge), 2004

1rN4B/1p4Q1/3p1K2/3p3R/4p2P/p1p5/Pk4pr/bB4R1

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Ra8
      • 2.Qxb7#
    • 1...Rxc8
      • 2.Qxb7#
    • 1...d4
      • 2.Rb5#
  • Tries
    • 1.Kf5?
      • threat
        • 2.Qxc3#
      • 1...Rxc8
        • 2.Qxb7#
      • 1...Rh3
        • 2.Qxg2#
      • 1...d4!
    • 1.Kg6?
      • threat
        • 2.Qxc3#
      • 1...Rxc8
        • 2.Qxb7#
      • 1...d4
        • 2.Rb5#
      • 1...Rh3!
    • 1.Ke7?
      • threat
        • 2.Qxc3#
      • 1...d4
        • 2.Rb5#
      • 1...Rh3
        • 2.Qxg2#
      • 1...Rxc8!
    • 1.Kf7?
      • threat
        • 2.Qxc3#
      • 1...d4
        • 2.Rb5#
      • 1...Rh3
        • 2.Qxg2#
      • 1...Rxc8!
    • 1.Rxd5?
      • threat
        • 2.Rb5#
      • 1...c2
        • 2.Kf5#
        • 2.Kg5#
        • 2.Ke6#
        • 2.Kg6#
        • 2.Ke7#
        • 2.Kf7#
      • 1...b5!
  • Keys
    • 1.Ke6!
      • threat
        • 2.Qxc3#
      • 1...Rxc8
        • 2.Qxb7#
      • 1...d4
        • 2.Rb5#
      • 1...Rh3
        • 2.Qxg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 1
  • Sets
    • R(k);N_GUARD::QAR(G),XP(j)
    • R(k);N_GUARD,XS(H)::QAR(G),XP(j)
    • P(h);OGATE::R(E)
  • Tries
    • Try
      • K(F);P-FLIGHT,P_PINP(f)
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • R(k);N_GUARD,XS(H)::QAR(G),XP(j)
        • R(d);N_GUARD::QAR(G),XP(c)
      • Refutation
        • P(h);N_SPINP(f)
    • Try
      • K(F);P-FLIGHT,P_PINP(f)
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • R(k);N_GUARD,XS(H)::QAR(G),XP(j)
        • P(h);N_SPINP(f),OGATE::R(E)
      • Refutation
        • R(d);
    • Try
      • K(F);P_PINP(f),S_FLIGHT
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • P(h);N_SPINP(f),OGATE::R(E)
        • R(d);N_GUARD::QAR(G),XP(c)
      • Refutation
        • R(k);XS(H)
    • Try
      • K(F);P-FLIGHT,P_PINP(f)
      • Threat
        • QAB1(G),XP(f)
      • Vars
        • P(h);N_SPINP(f),OGATE::R(E)
        • R(d);N_GUARD::QAR(G),XP(c)
      • Refutation
        • R(k);XS(H)
    • Try
      • R(E);XP(h)
      • Threat
        • R(E)
      • Refutation
        • P(j);
  • Actual
    • K(F);P-FLIGHT,P_PINP(f)
    • Threat
      • QAB1(G),XP(f)
    • Vars
      • R(k);N_GUARD,XS(H)::QAR(G),XP(j)
      • P(h);N_SPINP(f),OGATE::R(E)
      • R(d);N_GUARD::QAR(G),XP(c)
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