MESON Chess Problem Database

Problem Display
PID: 61908 (1r6/1p6/1Kn5/1p1rNp2/3k1ppB/Q1p4n/P4P2/bB2R1N1 w - - 0 1)

Hirschenson, Aaron

Comm., Eretria 5 Days Ty., 2005

1r6/1p6/1Kn5/1p1rNp2/3k1ppB/Q1p4n/P4P2/bB2R1N1

#2

9 + 12

5673 Eretria Bulletin 2005
721 Variantim 2005

SOLUTION

  • SOUND
  • Sets
    • 1...Rc5
      • 2.Qxc5#
    • 1...Rd6
      • 2.Qc5#
      • 2.Qxd6#
    • 1...Rd7
      • 2.Qc5#
    • 1...Rdd8
      • 2.Qc5#
    • 1...Sxf2
      • 2.Bxf2#
    • 1...Sb4
      • 2.Qxb4#
    • 1...Sa7
      • 2.Qb4#
    • 1...Se7
      • 2.Qb4#
    • 1...Sd8
      • 2.Qb4#
    • 1...c2
      • 2.Qd3#
    • 1...g3
      • 2.Sgf3#
  • Tries
    • 1.Sef3+?
      • 1...Kc4
        • 2.Qb3#
      • 1...gxf3!
    • 1.Sxc6+?
      • 1...Kc4
        • 2.Qb4#
        • 2.Qb3#
      • 1...bxc6+!
    • 1.Bf6?
      • threat
        • 2.Se2#
        • 2.Rd1#
      • 1...Rxe5
        • 2.Qc5#
      • 1...Sxg1
        • 2.Rd1#
      • 1...Sxe5
        • 2.Qb4#
      • 1...Rc5
        • 2.Rd1#
        • 2.Qxc5#
      • 1...Rd6
        • 2.Rd1#
        • 2.Qc5#
        • 2.Qxd6#
      • 1...Rd7
        • 2.Rd1#
        • 2.Qc5#
      • 1...Rdd8
        • 2.Rd1#
        • 2.Qc5#
      • 1...Sb4
        • 2.Se2#
        • 2.Qxb4#
      • 1...c2
        • 2.Qd3#
      • 1...f3
        • 2.Rd1#
      • 1...Sxf2!
    • 1.Qa4+?
      • 1...Sb4
        • 2.Qxb4#
      • 1...b4
        • 2.Qd1#
      • 1...bxa4!
  • Keys
    • 1.Qb3!
      • threat
        • 2.Qd1#
      • 1...Rxe5
        • 2.Rd1#
      • 1...Sxf2
        • 2.Bxf2#
      • 1...Sxe5
        • 2.Se2#
      • 1...Sb4
        • 2.Qxb4#
      • 1...c2
        • 2.Qd3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 7
  • Sets
    • R(h);N_GUARD::QAB1(F),XR(h)
    • R(h);N_GUARD::QAB1(F)
    • S(c);OGATE,XP(E)::B(G),XS(c)
    • S(j);N_GUARD::QAR2(F),XS(j)
    • S(j);N_GUARD::QAR2(F)
    • P(b);OGATE::QAR1(F)
    • P(f);N_GUARD::S(C)
  • Tries
    • Try
      • S(H);CHECK
      • Vars
        • K(d);P-FLIGHT::QAB1(F)
      • Refutation
        • P(f);XS(H)
    • Try
      • S(H);CHECK,XS(j)
      • Refutation
        • P(k);CHECK,XS(H)
    • Try
      • B(G);
      • Threat
        • DUALS(2)
      • Vars
        • R(h);N_GUARD,P_SPINR(h),XS(H)::QAB1(F)
        • S(c);XS(C)::R(B)
        • S(j);N_GUARD,P_SPINS(j),XS(H)::QAR2(F)
        • P(b);OGATE::QAR1(F)
        • P(e);::R(B)
      • Refutation
        • S(c);XP(E)
    • Try
      • Q(F);CHECK
      • Vars
        • S(j);N_GUARD,P_SPINS(j)::QAR2(F),XS(j)
        • P(g);P_SPINP(g)::QAR(F)
      • Refutation
        • P(g);XQ(F)
  • Actual
    • Q(F);
    • Threat
      • QAR(F)
    • Vars
      • R(h);SBLOCK,XS(H)::R(B)
      • S(c);OGATE,XP(E)::B(G),XS(c)
      • S(j);SBLOCK,XS(H)::S(C)
      • S(j);N_GUARD::QAR2(F),XS(j)
      • P(b);OGATE::QAR1(F)
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