MESON Chess Problem Database

Problem Display
PID: 82100 (b3q3/6b1/2NQ4/1B3N1r/2Rpp2p/nPPkp3/n3Rp2/2B2K2 w - - 0 1)

Ahues, Herbert Siegfried Oskar

Magyar Sakkelet, 1962

b3q3/6b1/2NQ4/1B3N1r/2Rpp2p/nPPkp3/n3Rp2/2B2K2

#2

10 + 12

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Bh6
      • 2.Qxd4#
    • 1...Bf8
      • 2.Qxd4#
    • 1...Sxc1
      • 2.Sb4#
    • 1...Sxc3
      • 2.Sb4#
      • 2.Rxd4#
    • 1...Sb4
      • 2.Sxb4#
    • 1...Sb1
      • 2.Rc5#
    • 1...Sc2
      • 2.Rc5#
  • Tries
    • 1.Scxd4?
      • threat
        • 2.Rxe3#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Bh6
        • 2.Sc6#
      • 1...Sc2
        • 2.Rc6#
      • 1...Sxc1!
    • 1.Bb2?
      • threat
        • 2.Rxd4#
      • 1...Sxc4
        • 2.Bxc4#
      • 1...Sxb5!
    • 1.Qb4?
      • threat
        • 2.Rxd4#
      • 1...Sxb4
        • 2.Sxb4#
      • 1...Sxc4
        • 2.Bxc4#
        • 2.Qxc4#
      • 1...dxc3
        • 2.Rxc3#
        • 2.Rd4#
      • 1...Sxb5!
    • 1.Qc5?
      • threat
        • 2.Rxd4#
      • 1...Sxc4
        • 2.Qxc4#
      • 1...dxc3
        • 2.Rxc3#
        • 2.Rd4#
        • 2.Qxe3#
      • 1...Sxb5!
  • Keys
    • 1.Sfxd4!
      • threat
        • 2.Rxe3#
      • 1...Bxd4
        • 2.Qxd4#
      • 1...Sxc1
        • 2.Sb4#
      • 1...Bh6
        • 2.Sf5#
      • 1...Sc2
        • 2.Rc5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 1
    • ADDED MATES = 1
    • REMOVED MATES = 3
  • Sets
    • B(j);N_GUARD::QAR1(J),XP(f)
    • S(a);N_GUARD,XB(A)::S(I)
    • S(a);N_GUARD::S(I),XS(a)
    • S(c);N_GUARD::B(G)+R(F)
  • Tries
    • Try
      • S(I);XP(f)
      • Threat
        • R1(C),XP(e)
      • Vars
        • B(j);OGATE,P_SPINB(j),XS(I)::QAR1(J),XB(j)
        • B(j);N_GUARD::QAR(J)+S(I)
        • S(c);N_GUARD::B(G)+R(F)
      • Refutation
        • S(a);XB(A)
    • Try
      • B(A);
      • Threat
        • B(G)+R(F),DCHECK,XP(f)
      • Vars
        • S(c);OGATE,P_SPINS(c),XR(F)::B(G),XS(c)
      • Refutation
        • S(c);XB(G)
    • Try
      • Q(J);N_PINP(f)
      • Threat
        • B(G)+R(F),DCHECK,XP(f)
      • Vars
        • S(a);XQ(J)::S(I),XS(a)
      • Refutation
        • S(c);XB(G)
    • Try
      • Q(J);N_PINP(f)
      • Threat
        • B(G)+R(F),DCHECK,XP(f)
      • Vars
        • S(c);OGATE,P_SPINS(c),XR(F)::QAB1(J),XS(c)
      • Refutation
        • S(c);XB(G)
  • Actual
    • S(H);XP(f)
    • Threat
      • R1(C),XP(e)
    • Vars
      • B(j);OGATE,P_SPINB(j),XS(H)::QAR1(J),XB(j)
      • S(a);N_GUARD,XB(A)::S(I)
      • B(j);N_GUARD::QAR(J)+S(H)
      • S(c);N_GUARD::B(G)+R(F)
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