MESON Chess Problem Database

Problem Display
PID: 144678 (bb1r1rq1/1n3n2/6p1/1B6/pN6/N1kp3R/P7/1R1K2B1 w - - 0 1)

Apro, Laszlo

Magyar Sakkvilag, 1931

bb1r1rq1/1n3n2/6p1/1B6/pN6/N1kp3R/P7/1R1K2B1

#2

8 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Rd5
      • 2.Sxd5#
    • 1...Rc8
      • 2.Sd5#
      • 2.Rxd3#
    • 1...Rde8
      • 2.Sd5#
      • 2.Rxd3#
    • 1...Bd6
      • 2.Sd5#
      • 2.Rxd3#
    • 1...Sbd6
      • 2.Rxd3#
    • 1...Sfd6
      • 2.Rxd3#
  • Tries
    • 1.Sxd3?
      • threat
        • 2.Rc1#
      • 1...Rxd3+
        • 2.Rxd3#
      • 1...Bf4!
    • 1.Rc1+?
      • 1...Kb2
        • 2.Sc4#
      • 1...Kxb4!
  • Keys
    • 1.Bxd3!
      • threat
        • 2.Sb5#
      • 1...Rxd3+
        • 2.Rxd3#
      • 1...Rd5
        • 2.Sxd5#
      • 1...Sbd6
        • 2.Be4#
      • 1...Sfd6
        • 2.Bf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(i);N_GUARD::S(G),XR(i)
    • S(e);S_CUTR(i)::R1(F),XP(b)
    • S(f);S_CUTR(i)::R1(F),XP(b)
  • Tries
    • Try
      • S(G);P_SPINS(G),XP(b)
      • Threat
        • R(A)
      • Vars
        • R(i);CHECK,OGATE,P_SPINR(i),XS(G)::R1(F),XR(i)
      • Refutation
        • B(h);
    • Try
      • R(A);CHECK
      • Vars
        • K(a);N_SPINP(b),S_FLIGHT::S(E)
      • Refutation
        • K(a);N_SPINP(b),S_FLIGHT,XS(G)
  • Actual
    • B(H);P_SPINB(H),XP(b)
    • Threat
      • S(E)
    • Vars
      • R(i);CHECK,OGATE,P_SPINR(i),XB(H)::R1(F),XR(i)
      • R(i);N_GUARD::S(G),XR(i)
      • S(e);N_PINB(H)::R(F)+B(H)
      • S(f);N_PINB(H)::R(F)+B(H)
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