MESON Chess Problem Database

Problem Display
PID: 198276 (Q7/3B4/1K1p1Rqp/1PN1k1P1/5p1n/2Pp2bp/2NB2b1/5r2 w - - 0 1)

Roura, Juan R

Rivista del Club Argentino de Ajedrez, 1920

Q7/3B4/1K1p1Rqp/1PN1k1P1/5p1n/2Pp2bp/2NB2b1/5r2

#2

10 + 11

6490 yacpdb 2019

SOLUTION

  • SOUND
  • Sets
    • 1...Qh5
      • 2.Sxd3#
    • 1...Qf7
      • 2.Sxd3#
    • 1...Qe8
      • 2.Sxd3#
    • 1...Qxf6
      • 2.Sxd3#
    • 1...Qg7
      • 2.Sxd3#
    • 1...Qg8
      • 2.Sxd3#
    • 1...Bf2
      • 2.Bxf4#
    • 1...Sf5
      • 2.Sxd3#
    • 1...d5
      • 2.Qb8#
  • Tries
    • 1.Rf5+?
      • 1...Sxf5
        • 2.Sxd3#
      • 1...Qxf5!
    • 1.Qc6?
      • threat
        • 2.Qxd6#
      • 1...Qxf6
        • 2.Sxd3#
      • 1...dxc5
        • 2.Qe6#
      • 1...Sf5
        • 2.Sxd3#
      • 1...d5
        • 2.Qd6#
        • 2.Qe6#
        • 2.Qc7#
      • 1...Bxc6!
    • 1.Qe8+?
      • 1...Kd5
        • 2.Qe6#
      • 1...Qxe8!
  • Keys
    • 1.c4!
      • threat
        • 2.Bc3#
      • 1...Qe4
        • 2.Qe8#
      • 1...Be1
        • 2.Qa1#
      • 1...Bf2
        • 2.Bxf4#
      • 1...Sf3
        • 2.Qd5#
      • 1...Sf5
        • 2.Sxd3#
      • 1...d5
        • 2.Qb8#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 6
  • Sets
    • Q(j);N_GUARD::S(E),XP(c)
    • Q(j);N_GUARD,XR(H)::S(E),XP(c)
    • B(d);N_GUARD,P_PINS(E),S_CUTR(a)::B(B),XP(f)
    • S(g);S_CUTQ(j)::S(E),XP(c)
    • P(i);OGATEB,P_PINR(H),SBLOCK::QAB(J)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • S(g);XR(H)::S(E),XP(c)
      • Refutation
        • Q(j);XR(H)
    • Try
      • Q(J);
      • Threat
        • QAB1(J),XP(i)
      • Vars
        • Q(j);N_GUARD,XR(H)::S(E),XP(c)
        • P(i);OGATE,XS(E)::QAR1(J)
        • S(g);S_CUTQ(j)::S(E),XP(c)
      • Refutation
        • B(b);XQ(J)
    • Try
      • Q(J);CHECK
      • Vars
        • K(h);P-FLIGHT::QAB1(J)
      • Refutation
        • Q(j);XQ(J)
  • Actual
    • P(C);
    • Threat
      • B(B)
    • Vars
      • Q(j);N_GUARD::QAR(J)
      • B(d);S_CUTR(a)::QAB(J)
      • B(d);N_GUARD,P_PINS(E),S_CUTR(a)::B(B),XP(f)
      • S(g);S_CUTB(b)::QAR1(J)
      • S(g);S_CUTQ(j)::S(E),XP(c)
      • P(i);OGATEB,P_PINR(H)::QAB(J)
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