MESON Chess Problem Database

Problem Display
PID: 106193 (4B2B/5p1Q/4r3/p1rPnp2/N1k1PRp1/P7/2P1K3/1R6 w - - 0 1)

Morra, Juan Carlos

Praca, 1955

4B2B/5p1Q/4r3/p1rPnp2/N1k1PRp1/P7/2P1K3/1R6

#2

11 + 8

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Sd3
      • 2.cxd3#
    • 1...Sf3
      • 2.Sb2#
    • 1...Sc6
      • 2.Sb6#
    • 1...Sg6
      • 2.Sb2#
    • 1...fxe4
      • 2.Qxe4#
  • Tries
    • 1.Bb5+?
      • 1...Kd4
        • 2.Rd1#
      • 1...Rxb5!
  • Keys
    • 1.Qh1!
      • threat
        • 2.exf5#
      • 1...Kd4
        • 2.exf5#
      • 1...Rxd5
        • 2.exd5#
      • 1...fxe4
        • 2.Qxe4#
      • 1...Sd3
        • 2.cxd3#
      • 1...Sf3
        • 2.Sb2#
      • 1...Sc6
        • 2.Sb6#
      • 1...Sg6
        • 2.Sb2#
      • 1...Sd7
        • 2.e5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 0
  • Sets
    • S(e);OGATE,P_PINP(F)::P(B),XS(e)
    • S(e);P_PINP(F)::S(E)
    • S(e);P_PINP(F),S_CUTR(g)::S(E)
    • P(f);OGATE,P_SPINP(f),XP(F)::QAR2(I),XP(f)
  • Tries
    • Try
      • B(J);CHECK
      • Vars
        • K(a);P-FLIGHT,P_SPINS(e)::R(A)
      • Refutation
        • R(d);XB(J)
  • Actual
    • Q(I);
    • Threat
      • R(G)+P(F),XP(f)
    • Vars
      • K(a);P-FLIGHT,P_SPINS(e)::R(G)+P(F),XP(f)
      • R(d);OGATE,XP(H)::R(G)+P(F),XR(d)
      • P(f);OGATE,P_SPINP(f),XP(F)::QAR2(I),XP(f)
      • S(e);OGATE,P_PINP(F)::P(B),XS(e)
      • S(e);P_PINP(F)::S(E)
      • S(e);P_PINP(F),S_CUTR(g)::S(E)
      • S(e);OGATE,P_PINP(F)::R(G)+P(F)
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