MESON Chess Problem Database

Problem Display
PID: 168347 (Q7/3r2pR/2q5/4RPNp/4p1kp/1B2P2N/6PK/8 w - - 0 1)

Petite, Efren

Phenix, 2003

Q7/3r2pR/2q5/4RPNp/4p1kp/1B2P2N/6PK/8

#2

10 + 7

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qb5
      • 2.Qxe4#
    • 1...Qc1
      • 2.Qxe4#
    • 1...Qc3
      • 2.Qxe4#
    • 1...Qc5
      • 2.Qxe4#
    • 1...Qa6
      • 2.Qxe4#
    • 1...Qb6
      • 2.Qxe4#
    • 1...Qd6
      • 2.Qxe4#
    • 1...Qe6
      • 2.Qxe4#
    • 1...Qf6
      • 2.Qxe4#
    • 1...Qg6
      • 2.Qxe4#
    • 1...Qh6
      • 2.Qxe4#
    • 1...Qc7
      • 2.Qxe4#
    • 1...Qc8
      • 2.Qxe4#
    • 1...Rd1
      • 2.Bxd1#
    • 1...Ra7
      • 2.Bd1#
    • 1...Rb7
      • 2.Bd1#
    • 1...Rc7
      • 2.Bd1#
    • 1...Re7
      • 2.Bd1#
    • 1...Rf7
      • 2.Bd1#
  • Tries
    • 1.Se6?
      • threat
        • 2.Sf2#
      • 1...Qxe6
        • 2.Qxe4#
      • 1...Rd2
        • 2.Rxg7#
      • 1...Qc2!
    • 1.Sf7?
      • threat
        • 2.Sf2#
      • 1...Rxf7
        • 2.Bd1#
      • 1...Qc2
        • 2.Rxg7#
      • 1...Rd2!
    • 1.Rxe4+?
      • 1...Qxe4
        • 2.Qxe4#
      • 1...Kxf5!
  • Keys
    • 1.Rxg7!
      • threat
        • 2.Sf2#
      • 1...Rxg7
        • 2.Bd1#
      • 1...Qc2
        • 2.Sf7#
      • 1...Qg6
        • 2.Qxe4#
      • 1...Rd2
        • 2.Se6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 18
  • Sets
    • Q(e);OGATE::QAR2(J),XP(a)
    • Q(e);OGATE,P_PINR(F)::QAR2(J),XP(a)
    • R(f);N_GUARD::B(C),XR(f)
    • R(f);N_GUARD::B(C)
  • Tries
    • Try
      • S(H);
      • Threat
        • S(E)
      • Vars
        • Q(e);OGATE,XS(H)::QAR2(J),XP(a)
        • R(f);N_GUARD,P_PINP(A)::R(I),XP(g)
      • Refutation
        • Q(e);P_PINP(A)
    • Try
      • S(H);
      • Threat
        • S(E)
      • Vars
        • R(f);N_GUARD,XS(H)::B(C)
        • Q(e);N_GUARD,P_PINP(A)::R(I),XP(g)
      • Refutation
        • R(f);P_PINP(A)
    • Try
      • R(F);CHECK,XP(a)
      • Vars
        • Q(e);OGATE,XR(F)::QAR2(J),XQ(e)
      • Refutation
        • K(b);S_FLIGHT,XP(G)
  • Actual
    • R(I);XP(g)
    • Threat
      • S(E)
    • Vars
      • R(f);N_GUARD,XR(I)::B(C)
      • Q(e);N_GUARD,P_PINP(A)::R(I)+S(H)
      • Q(e);OGATE::QAR2(J),XP(a)
      • R(f);N_GUARD,P_PINP(A)::R(I)+S(H)
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