MESON Chess Problem Database

Problem Display
PID: 239030 (3R4/4R3/8/1qN3Nr/r1Qppp2/2npkP2/7P/3nBK1B w - - 0 1)

Petite, Efren

Problemas, 2014

3R4/4R3/8/1qN3Nr/r1Qppp2/2npkP2/7P/3nBK1B

#2

10 + 10

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Qxd3#
    • 1...Qd7
      • 2.Qxd3#
    • 1...Qe8
      • 2.Qxd3#
    • 1...Qb2
      • 2.Qxd3#
    • 1...Qb3
      • 2.Qxd3#
    • 1...Qb4
      • 2.Qxd3#
    • 1...Qa5
      • 2.Qxd3#
    • 1...Qb6
      • 2.Qxd3#
    • 1...Qb7
      • 2.Qxd3#
    • 1...Qb8
      • 2.Qxd3#
    • 1...Ra1
      • 2.Qxd4#
    • 1...Ra2
      • 2.Qxd4#
    • 1...Ra3
      • 2.Qxd4#
    • 1...Ra5
      • 2.Qxd4#
    • 1...Ra6
      • 2.Qxd4#
    • 1...Ra7
      • 2.Qxd4#
    • 1...Ra8
      • 2.Qxd4#
    • 1...Sb1
      • 2.Rxe4#
    • 1...Sa2
      • 2.Rxe4#
    • 1...Se2
      • 2.Rxe4#
    • 1...Sd5
      • 2.Rxe4#
  • Tries
    • 1.Scxe4?
      • threat
        • 2.Bd2#
      • 1...Sxe4
        • 2.Rxe4#
      • 1...Qb2
        • 2.Sxc3#
      • 1...Ra2
        • 2.Qxd4#
      • 1...Sb1
        • 2.Sc5#
      • 1...d2
        • 2.Bxd2#
      • 1...Rxh2!
  • Keys
    • 1.Sgxe4!
      • threat
        • 2.Bd2#
      • 1...Rxh2
        • 2.Sxc3#
      • 1...Sxe4
        • 2.Rxe4#
      • 1...Qb2
        • 2.Qxd3#
      • 1...Ra2
        • 2.Qxd4#
      • 1...Sb1
        • 2.Sg5#
      • 1...d2
        • 2.Bxd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 3
    • REMOVED MATES = 18
  • Sets
    • Q(i);N_GUARD::QAR1(F),XP(c)
    • R(e);N_GUARD::QAB1(F),XP(f)
    • S(b);N_GUARD::R1(I),XP(g)
  • Tries
    • Try
      • S(G);XP(g)
      • Threat
        • B(A)
      • Vars
        • S(b);OGATE,P_SPINS(b),XS(G)::R1(I),XS(b)
        • Q(i);N_GUARD::R(I)+S(G),XS(b)
        • R(e);N_GUARD::QAB1(F),XP(f)
        • S(b);N_GUARD::R(I)+S(G)
        • P(c);P_PINQ(F)::B(A),XP(c)
      • Refutation
        • R(j);XP(D)
  • Actual
    • S(H);XP(g)
    • Threat
      • B(A)
    • Vars
      • R(j);N_GUARD,XP(D)::R(I)+S(H),XS(b)
      • S(b);OGATE,P_SPINS(b),XS(H)::R1(I),XS(b)
      • Q(i);N_GUARD::QAR1(F),XP(c)
      • R(e);N_GUARD::QAB1(F),XP(f)
      • S(b);N_GUARD::R(I)+S(H)
      • P(c);P_PINQ(F)::B(A),XP(c)
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