MESON Chess Problem Database

Problem Display
PID: 66372 (5b2/3r1p2/R4ppn/1R1pNkN1/1q2p3/4P2K/4P1QB/1r6 w - - 0 1)

Syzonenko, Viktor N

Phenix, 1998

5b2/3r1p2/R4ppn/1R1pNkN1/1q2p3/4P2K/4P1QB/1r6

#2

9 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Sg4
      • 2.Qxg4#
    • 1...Sg8
      • 2.Qg4#
    • 1...fxg5
      • 2.Qf2#
  • Tries
    • 1.Kh4?
      • threat
        • 2.Qf2#
      • 1...fxg5+
        • 2.Qxg5#
      • 1...Rf1
        • 2.Qxf1#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Qe1+!
    • 1.Sef3?
      • threat
        • 2.Sh4#
      • 1...fxg5
        • 2.Qxg5#
      • 1...Qe1
        • 2.Sd4#
      • 1...Sg4
        • 2.Qxg4#
      • 1...exf3!
    • 1.Se6?
      • threat
        • 2.Qf2#
      • 1...fxe6
        • 2.Qxg6#
      • 1...Qd6
        • 2.Sd4#
      • 1...Bd6
        • 2.Sg7#
      • 1...Qe1
        • 2.Sd4#
      • 1...Rf1
        • 2.Qxf1#
      • 1...Sg4
        • 2.Qxg4#
      • 1...Rd6!
    • 1.Qg3?
      • threat
        • 2.Qf4#
      • 1...fxe5
        • 2.Qxe5#
      • 1...fxg5
        • 2.Qf2#
      • 1...Rf1!
  • Keys
    • 1.Sexf7!
      • threat
        • 2.Qf2#
      • 1...Rxf7
        • 2.Rxd5#
      • 1...Sxf7
        • 2.Qg4#
      • 1...Qe1
        • 2.Qxe4#
      • 1...Qd6
        • 2.Qxe4#
      • 1...Rf1
        • 2.Qxf1#
      • 1...Bd6
        • 2.Sxh6#
      • 1...Sg4
        • 2.Qxg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 2
  • Sets
    • S(h);N_GUARD::QAB1(B),XS(h)
    • S(h);N_GUARD::QAB1(B)
    • P(f);SBLOCK,XS(H)::QAR(B)
  • Tries
    • Try
      • K(E);P-FLIGHT
      • Threat
        • QAR(B)
      • Vars
        • P(f);CHECK,OGATE,XS(H)::QAR1(B),XP(f)
        • R(a);N_GUARD::QAR(B),XR(a)
        • S(h);N_GUARD::QAB1(B),XS(h)
      • Refutation
        • Q(b);CHECK
    • Try
      • S(G);P_PINP(d)
      • Threat
        • S(G)
      • Vars
        • P(f);OGATE,XS(H)::QAR1(B),XP(f)
        • Q(b);N_GUARD::S(G)
        • S(h);N_GUARD::QAB1(B),XS(h)
      • Refutation
        • P(c);XS(G)
    • Try
      • S(H);
      • Threat
        • QAR(B)
      • Vars
        • P(j);N_GUARD,XS(H)::QAB1(B),XP(g)
        • Q(b);N_GUARD::S(H)
        • B(k);N_GUARD::S(H)
        • R(a);N_GUARD::QAR(B),XR(a)
        • S(h);N_GUARD::QAB1(B),XS(h)
      • Refutation
        • R(i);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • P(f);OGATE,XS(G)::QAR1(B),XP(f)
        • P(f);SBLOCK,XS(H)::QAR(B)
      • Refutation
        • R(a);
  • Actual
    • S(G);P_PINP(d),XP(j)
    • Threat
      • QAR(B)
    • Vars
      • R(i);N_GUARD,XS(G)::R(F),XP(d)
      • S(h);N_GUARD,XS(G)::QAB1(B)
      • Q(b);N_GUARD::QAB1(B),XP(c)
      • R(a);N_GUARD::QAR(B),XR(a)
      • B(k);N_GUARD::S(G),XS(h)
      • S(h);N_GUARD::QAB1(B),XS(h)
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