MESON Chess Problem Database

Problem Display
PID: 84832 (qnb5/6N1/3p1BQP/6PB/1b3P1k/1r5p/5PRR/2n1N2K w - - 0 1)

Labai, Zoltan

Petite, Efren

4th Prize, Hlas l'udu, 1991

qnb5/6N1/3p1BQP/6PB/1b3P1k/1r5p/5PRR/2n1N2K

#2

12 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Qxg2+
      • 2.Sxg2#
    • 1...Rg3
      • 2.fxg3#
    • 1...Bf5
      • 2.Sxf5#
    • 1...Ba6
      • 2.Sf5#
    • 1...Bb7
      • 2.Sf5#
    • 1...Sd7
      • 2.Sf5#
  • Tries
    • 1.Bf3?
      • threat
        • 2.Qh5#
      • 1...Bg4
        • 2.Rxg4#
      • 1...Qxf3!
    • 1.Qd3?
      • threat
        • 2.g6#
      • 1...Qxg2+
        • 2.Sxg2#
      • 1...Qa1
        • 2.Sf3#
      • 1...Qa5
        • 2.Sf3#
      • 1...Bc3
        • 2.Qg3#
      • 1...Sd7
        • 2.Rxh3#
      • 1...Qd5!
    • 1.Qe4?
      • threat
        • 2.g6#
      • 1...Qa1
        • 2.f5#
      • 1...Qa5
        • 2.f5#
      • 1...Rg3
        • 2.fxg3#
      • 1...Bc3
        • 2.Sf3#
      • 1...Sd7
        • 2.Rg4#
      • 1...Qd5!
  • Keys
    • 1.Qf5!
      • threat
        • 2.g6#
      • 1...Qxg2+
        • 2.Sxg2#
      • 1...Qa1
        • 2.Rg4#
      • 1...Rg3
        • 2.fxg3#
      • 1...Bc3
        • 2.Rxh3#
      • 1...Sd7
        • 2.Qg4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • Q(g);CHECK,XR(D)::S(A),XQ(g)
    • R(b);OGATE::P(C),XR(b)
    • B(i);N_GUARD::S(L),XB(i)
    • B(i);N_GUARD,SBLOCK::S(L)
    • B(i);N_GUARD::S(L)
    • S(h);S_CUTB(i)::S(L)
  • Tries
    • Try
      • B(H);N_SPINR(D)
      • Threat
        • QAR1(J)
      • Vars
        • B(i);N_GUARD::R1(D),XB(i)
      • Refutation
        • Q(g);P_PINR(D),XB(H)
    • Try
      • Q(J);
      • Threat
        • B(I)+P(G)
      • Vars
        • Q(g);CHECK,XR(D)::S(A),XQ(g)
        • Q(g);N_GUARD,N_PINR(D)::S(A)
        • Q(g);N_GUARD,N_PINR(D),SBLOCK::S(A)
        • B(d);S_CUTR(b)::QAB1(J)
        • S(h);S_CUTB(i)::R1(E),XP(c)
      • Refutation
        • Q(g);
    • Try
      • Q(J);N_SPINR(D)
      • Threat
        • B(I)+P(G)
      • Vars
        • Q(g);N_GUARD::QAR(J)+P(F)
        • Q(g);N_GUARD,SBLOCK::QAR(J)+P(F)
        • R(b);OGATE::P(C),XR(b)
        • B(d);S_CUTR(b)::S(A)
        • S(h);S_CUTB(i)::R1(D)
      • Refutation
        • Q(g);
  • Actual
    • Q(J);
    • Threat
      • B(I)+P(G)
    • Vars
      • Q(g);CHECK,XR(D)::S(A),XQ(g)
      • Q(g);N_PINR(D)::R1(D)
      • R(b);OGATE::P(C),XR(b)
      • B(d);S_CUTR(b)::R1(E),XP(c)
      • S(h);S_CUTB(i)::QAR1(J)
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