MESON Chess Problem Database

Problem Display
PID: 168235 (6r1/3pBB1n/1pR2p2/Np2kP2/7b/2p1PRP1/Kp3N2/1n1r4 w - - 0 1)

Petite, Efren

Die Schwalbe, 1957

6r1/3pBB1n/1pR2p2/Np2kP2/7b/2p1PRP1/Kp3N2/1n1r4

#2

10 + 12

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rc1
      • 2.Bd6#
    • 1...Re1
      • 2.Bd6#
    • 1...Rf1
      • 2.Bd6#
    • 1...Rg1
      • 2.Bd6#
    • 1...Rh1
      • 2.Bd6#
    • 1...Rd6
      • 2.Bxd6#
    • 1...Sd2
      • 2.Bd6#
    • 1...Sg5
      • 2.Bxf6#
    • 1...b4
      • 2.Sc4#
    • 1...dxc6
      • 2.Sxc6#
    • 1...d5
      • 2.Bd6#
      • 2.Re6#
  • Tries
    • 1.Rc5+?
      • 1...Rd5
        • 2.Rxd5#
      • 1...d5
        • 2.Sc6#
      • 1...bxc5!
    • 1.Re6+?
      • 1...Kd5
        • 2.Re4#
      • 1...dxe6!
  • Keys
    • 1.Rc4!
      • threat
        • 2.Re4#
      • 1...bxc4
        • 2.Sxc4#
      • 1...Rd4
        • 2.exd4#
      • 1...Rg4
        • 2.Sxg4#
      • 1...Sd2
        • 2.Sd3#
      • 1...Sg5
        • 2.Sg4#
      • 1...d5
        • 2.Sc6#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 4
    • REMOVED MATES = 8
  • Sets
    • R(b);N_GUARD::B(I)
    • R(b);N_GUARD::B(I),XR(b)
    • S(a);S_CUTR(b)::B(I)
    • S(k);N_GUARD,S_CUTB(e)::B(I),XP(i)
    • P(f);N_GUARD::S(F)
    • P(j);XR(H)::S(F),XP(j)
  • Tries
    • Try
      • R(H);CHECK
      • Vars
        • R(b);N_GUARD,P_SPINR(b)::R1(H),XR(b)
        • P(j);P_SPINP(j)::S(F)
      • Refutation
        • P(h);XR(H)
    • Try
      • R(H);CHECK
      • Vars
        • K(g);OGATE,P-FLIGHT::B(J)+R(H)
      • Refutation
        • P(j);XR(H)
  • Actual
    • R(H);
    • Threat
      • R1(H)
    • Vars
      • P(f);XR(H)::S(F),XP(f)
      • R(b);OGATE::P(C),XR(b)
      • R(l);N_GUARD::S(B),XR(l)
      • S(a);S_CUTR(b)::S(B)
      • S(k);S_CUTR(l)::S(B)
      • P(j);N_GUARD::S(F)
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