MESON Chess Problem Database

Problem Display
PID: 246661 (Kb3N1B/1p6/p4Rb1/r2Nk1n1/q7/8/Q3P3/3R4 w - - 0 1)

Morra, Juan Carlos

El Ajedrez Espanol, 1955

Kb3N1B/1p6/p4Rb1/r2Nk1n1/q7/8/Q3P3/3R4

#2

8 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Qe4
      • 2.Sd7#
    • 1...Rxd5
      • 2.Qxd5#
    • 1...Bf5
      • 2.Re6#
    • 1...Bd6
      • 2.Rf4#
    • 1...Se4
      • 2.Sxg6#
  • Tries
    • 1.Rf3+?
      • 1...Ke4
        • 2.Sc3#
      • 1...Kd6!
    • 1.Qb2+?
      • 1...Qd4
        • 2.Qxd4#
      • 1...Ke4!
  • Keys
    • 1.e4!
      • threat
        • 2.Re6#
      • 1...Kxe4
        • 2.Qe2#
      • 1...Qxe4
        • 2.Sd7#
      • 1...Rxd5
        • 2.Qxd5#
      • 1...Bxe4
        • 2.Qh2#
      • 1...Sxe4
        • 2.Sxg6#
      • 1...Se6
        • 2.Rxe6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 2
  • Sets
    • Q(a);N_GUARD,SBLOCK::S(G)
    • R(b);OGATE,XS(D)::QAR1(B),XR(b)
    • B(f);SBLOCK::B(H)+R(E),DCHECK
    • B(h);SBLOCK::B(H)+R(E)
    • S(d);SBLOCK::S(G),XB(f)
  • Tries
    • Try
      • R(E);CHECK
      • Vars
        • K(c);P-FLIGHT::S(D)
      • Refutation
        • K(c);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • Q(a);N_GUARD,P_SPINQ(a)::QAB1(B),XQ(a)
      • Refutation
        • K(c);P-FLIGHT
  • Actual
    • P(C);
    • Threat
      • B(H)+R(E),DCHECK
    • Vars
      • K(c);OGATEB,P-FLIGHT,XP(C)::QAR2(B)
      • Q(a);N_GUARD,SBLOCK,XP(C)::S(G)
      • R(b);OGATE,XS(D)::QAR1(B),XR(b)
      • B(f);SBLOCK,XP(C)::QAB(B)
      • S(d);SBLOCK,XP(C)::S(G),XB(f)
      • S(d);::B(H)+R(E),DCHECK,XS(d)
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