MESON Chess Problem Database

Problem Display
PID: 82353 (2R3b1/K3N3/6n1/1B2P1R1/n1Nk3r/2p1pP2/2Q5/b6r w - - 0 1)

Ahues, Herbert Siegfried Oskar

Problemas, 1995

2R3b1/K3N3/6n1/1B2P1R1/n1Nk3r/2p1pP2/2Q5/b6r

#2

9 + 9

6490 yacpdb 2009

SOLUTION

  • SOUND
  • Sets
    • 1...Rd1
      • 2.Qxd1#
    • 1...R1h3
      • 2.Qd1#
    • 1...Rh2
      • 2.Qe4#
    • 1...R4h3
      • 2.Qe4#
    • 1...Re4
      • 2.Qxe4#
    • 1...Rh5
      • 2.Qe4#
    • 1...Rh6
      • 2.Qe4#
    • 1...Rh7
      • 2.Qe4#
    • 1...Rh8
      • 2.Qe4#
    • 1...Bxc4
      • 2.Rxc4#
    • 1...Bd5
      • 2.Sf5#
    • 1...Sf4
      • 2.Qe4#
  • Tries
    • 1.Sa5?
      • threat
        • 2.Qd3#
      • 1...Sc5
        • 2.Sac6#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sb2
        • 2.Qxc3#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sxe5!
    • 1.Sd6?
      • threat
        • 2.Qd3#
      • 1...Sxe5
        • 2.Sdf5#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sb2
        • 2.Qxc3#
      • 1...Sf4
        • 2.Qe4#
      • 1...Sc5!
    • 1.Rg4+?
      • 1...Sf4
        • 2.Qe4#
      • 1...Rxg4!
    • 1.Rd8+?
      • 1...Bd5
        • 2.Rxd5#
      • 1...Kc5!
  • Keys
    • 1.Sb6!
      • threat
        • 2.Qd3#
      • 1...Sxe5
        • 2.Sf5#
      • 1...Sc5
        • 2.Sc6#
      • 1...Rd1
        • 2.Qxd1#
      • 1...Bc4
        • 2.Rxc4#
      • 1...Sb2
        • 2.Qxc3#
      • 1...Sf4
        • 2.Qe4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 3
    • REMOVED MATES = 9
  • Sets
    • R(b);N_GUARD::QAR(A),XR(b)
    • R(b);N_GUARD::QAR(A)
    • R(g);N_GUARD::QAR1(A)
    • R(g);N_GUARD::QAR1(A),XR(g)
    • R(g);N_GUARD,P_PINS(H)::QAR1(A)
    • B(i);OGATE,XS(C)::R1(I),XB(i)
    • B(i);SBLOCK::S(H)
    • S(h);S_CUTR(g)::QAR1(A)
  • Tries
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • S(e);SBLOCK::S(C)
        • R(b);N_GUARD::QAR(A),XR(b)
        • B(i);N_GUARD::R1(I),XB(i)
        • S(e);N_GUARD,S_CUTB(a)::QAB1(A),XP(c)
        • S(h);S_CUTR(g)::QAR1(A)
      • Refutation
        • S(h);XP(E)
    • Try
      • S(C);
      • Threat
        • QAR1(A)
      • Vars
        • S(h);SBLOCK,XP(E)::S(C)
        • R(b);N_GUARD::QAR(A),XR(b)
        • B(i);N_GUARD::R1(I),XB(i)
        • S(e);N_GUARD,S_CUTB(a)::QAB1(A),XP(c)
        • S(h);S_CUTR(g)::QAR1(A)
      • Refutation
        • S(e);
    • Try
      • R(F);CHECK
      • Vars
        • S(h);P_SPINS(h)::QAR1(A)
      • Refutation
        • R(g);XR(F)
    • Try
      • R(I);CHECK
      • Vars
        • B(i);N_GUARD,P_SPINB(i)::R1(I),XB(i)
      • Refutation
        • K(f);S_FLIGHT
  • Actual
    • S(C);
    • Threat
      • QAR1(A)
    • Vars
      • S(h);SBLOCK,XP(E)::S(H)
      • S(e);SBLOCK::S(H)
      • R(b);N_GUARD::QAR(A),XR(b)
      • B(i);N_GUARD::R1(I),XB(i)
      • S(e);N_GUARD,S_CUTB(a)::QAB1(A),XP(c)
      • S(h);S_CUTR(g)::QAR1(A)
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