MESON Chess Problem Database

Problem Display
PID: 84869 (Q3R3/p1b2PK1/3pr1BB/qn1pk2N/br6/ppp3R1/3n4/8 w - - 0 1)

Petite, Efren

L'Italia Scacchistica, 1962

Q3R3/p1b2PK1/3pr1BB/qn1pk2N/br6/ppp3R1/3n4/8

#2

8 + 14

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd4
      • 2.Rg5#
    • 1...Sd4
      • 2.Bf4#
    • 1...d4
      • 2.Bf4#
      • 2.Rg5#
  • Tries
    • 1.Sf4?
      • threat
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qxd5#
      • 1...Rd4
        • 2.Rxe6#
      • 1...Sd4
        • 2.Sd3#
      • 1...d4
        • 2.Sd3#
        • 2.Rxe6#
        • 2.Qd5#
      • 1...Rxf4!
    • 1.Rd3?
      • threat
        • 2.Rxd5#
        • 2.Qxd5#
      • 1...Rxe8
        • 2.Qxd5#
        • 2.Qxe8#
        • 2.fxe8Q#
        • 2.fxe8R#
      • 1...Re7
        • 2.Rxe7#
        • 2.Qxd5#
      • 1...Sd4
        • 2.Bf4#
      • 1...d4
        • 2.Bf4#
      • 1...Rd4!
    • 1.Rxe6+?
      • 1...Kxe6
        • 2.Qe8#
      • 1...Kd4!
  • Keys
    • 1.Sf6!
      • threat
        • 2.Qxd5#
      • 1...Kd4
        • 2.Qxd5#
      • 1...Rd4
        • 2.Sd7#
      • 1...Sd4
        • 2.Sg4#
      • 1...d4
        • 2.Sg4#
        • 2.Sd7#
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(f);SBLOCK::R(A)
    • S(h);SBLOCK,S_CUTR(f)::B(D)
  • Tries
    • Try
      • S(B);
      • Threat
        • QAR1(G),XP(i)
      • Vars
        • K(j);N_SPINR(l),S_FLIGHT::QAR1(G),XP(i)
        • R(f);SBLOCK::R1(H),XR(l)
        • S(h);SBLOCK::S(B)
      • Refutation
        • R(f);XS(B)
    • Try
      • R(A);
      • Threat
        • DUALS(2)
      • Vars
        • S(h);S_CUTR(f)::B(D)
        • P(i);S_CUTR(f)::B(D)
      • Refutation
        • R(f);
    • Try
      • R(H);CHECK,XR(l)
      • Vars
        • K(j);P-FLIGHT,XR(H)::QAR2(G)
      • Refutation
        • K(j);S_FLIGHT
  • Actual
    • S(B);
    • Threat
      • QAR1(G),XP(i)
    • Vars
      • K(j);N_SPINR(l),S_FLIGHT::QAR1(G),XP(i)
      • R(f);SBLOCK::S(B)
      • S(h);SBLOCK,S_CUTR(f)::S(B)
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