MESON Chess Problem Database

Problem Display
PID: 251006 (3N3K/R1pn3B/8/2PkP3/1n2R3/4B3/b2pQ3/3r4 w - - 0 1)

Labai, Zoltan

Svitek, Miroslav

64 Shakhmatnoe obozrenie, 2021

3N3K/R1pn3B/8/2PkP3/1n2R3/4B3/b2pQ3/3r4

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...Bb1
      • 2.Qc4#
    • 1...Bc4
      • 2.Qxc4#
    • 1...Sd3
      • 2.Qxd3#
    • 1...Sa6
      • 2.Qd3#
    • 1...c6
      • 2.Rxd7#
  • Tries
    • 1.Rd4+?
      • 1...Kxc5
        • 2.Rxd2#
        • 2.Rd6#
        • 2.Rxd7#
      • 1...Kxe5!
    • 1.Qh5?
      • threat
        • 2.Qf7#
      • 1...Sxc5
        • 2.Rd4#
      • 1...Sxe5
        • 2.Qxe5#
      • 1...Sf8
        • 2.e6#
      • 1...Rf1!
    • 1.Qxd2+?
      • 1...Sd3
        • 2.Qxa2#
      • 1...Rxd2!
  • Keys
    • 1.Qb5!
      • threat
        • 2.Qxd7#
      • 1...Sxc5
        • 2.Qxc5#
      • 1...Sxe5
        • 2.Rd4#
      • 1...Sc6
        • 2.Qxc6#
      • 1...Sb6
        • 2.c6#
      • 1...Sf6
        • 2.c6#
      • 1...Sb8
        • 2.c6#
      • 1...Sf8
        • 2.c6#
      • 1...c6
        • 2.Rxd7#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 7
    • REMOVED MATES = 4
  • Sets
    • B(b);N_GUARD::QAB1(A)
    • B(b);N_GUARD::QAB1(A),XB(b)
    • S(d);N_GUARD::QAR2(A),XS(d)
    • S(d);N_GUARD::QAR2(A)
    • P(f);OGATE::R(F),XS(g)
  • Tries
    • Try
      • R(C);CHECK
      • Refutation
        • K(e);P-FLIGHT,XP(E)
    • Try
      • Q(A);
      • Threat
        • QAB(A)
      • Vars
        • S(g);SBLOCK,XP(D)::R1(C)
        • S(g);OGATE,P_SPINS(g),XP(E)::QAR1(A),XS(g)
        • S(g);N_GUARD::QAR(A)+P(E)
      • Refutation
        • R(a);
    • Try
      • Q(A);CHECK,XP(c)
      • Vars
        • S(d);N_GUARD,P_SPINS(d)::QAB(A),XB(b)
      • Refutation
        • R(a);XQ(A)
  • Actual
    • Q(A);
    • Threat
      • QAR2(A),XS(g)
    • Vars
      • S(g);OGATE,P_SPINS(g),XP(D)::QAR1(A),XS(g)
      • S(g);SBLOCK,XP(E)::R1(C)
      • S(d);N_GUARD::QAB1(A),XS(d)
      • S(g);N_GUARD::QAR(A)+P(D)
      • P(f);OGATE::R(F),XS(g)
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