MESON Chess Problem Database

Problem Display
PID: 59312 (br1R3q/4Q2p/7n/4N3/RN2k1P1/4ppB1/1KP1r3/3B4 w - - 0 1)

Hirschenson, Aaron

Variantim, 2004

br1R3q/4Q2p/7n/4N3/RN2k1P1/4ppB1/1KP1r3/3B4

#2

10 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe5+
      • 2.Qxe5#
    • 1...Qg8
      • 2.Sf7#
    • 1...Re1
      • 2.Bxf3#
    • 1...Rxc2+
      • 2.Bxc2#
    • 1...Rd2
      • 2.Bxf3#
    • 1...Rg2
      • 2.Bxf3#
    • 1...Rh2
      • 2.Bxf3#
    • 1...Rxb4+
      • 2.Rxb4#
      • 2.Qxb4#
    • 1...Rc8
      • 2.Sc6#
    • 1...Bb7
      • 2.Sa2#
      • 2.Sd3#
      • 2.Sd5#
      • 2.Sa6#
      • 2.Sc6#
  • Tries
    • 1.Qd6?
      • threat
        • 2.Qd3#
        • 2.Qd4#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rxb4+
        • 2.Rxb4#
        • 2.Qxb4#
      • 1...Rxd8
        • 2.Sa2#
        • 2.Sd3#
        • 2.Sd5#
        • 2.Sa6#
        • 2.Sc6#
      • 1...Sxg4
        • 2.Qd3#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Rd2
        • 2.Bxf3#
      • 1...Sf5
        • 2.Qd3#
      • 1...Qxd8!
    • 1.Qb7+?
      • 1...Bxb7
        • 2.Sa2#
        • 2.Sd3#
        • 2.Sd5#
        • 2.Sa6#
        • 2.Sc6#
      • 1...Rxb7!
    • 1.Qxh7+?
      • 1...Sf5
        • 2.Qxf5#
      • 1...Qxh7!
  • Keys
    • 1.Qe6!
      • threat
        • 2.Qc4#
      • 1...Qxe5+
        • 2.Qxe5#
      • 1...Rxc2+
        • 2.Bxc2#
      • 1...Rxb4+
        • 2.Rxb4#
      • 1...Qxd8
        • 2.Sc6#
      • 1...Rxd8
        • 2.Sd5#
      • 1...Sxg4
        • 2.Qxg4#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Qg8
        • 2.Sf7#
      • 1...Rd2
        • 2.Bxf3#
      • 1...Rc8
        • 2.Sc6#
      • 1...Sf5
        • 2.Qxf5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 6
    • REMOVED MATES = 3
  • Sets
    • Q(i);CHECK,OGATE,P_SPINQ(i),XS(H)::QAR1(I),XQ(i)
    • Q(i);::QAR(I)+S(H)
    • R(a);N_PINP(C),OGATE::B(A),XP(c)
    • R(a);CHECK,OGATE,XP(C)::B(A),XR(a)
    • R(a);OGATE::B(A),XP(c)
    • R(h);N_PINS(F),P_PINS(H)::R(E)+S(F)
  • Tries
    • Try
      • Q(I);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);CHECK,OGATE,XS(H)::QAR1(I),XQ(i)
        • R(a);CHECK,OGATE,XP(C)::B(A),XR(a)
        • S(e);XP(G)::QAB1(I)
        • B(g);N_GUARD::QAB1(I),XB(g)
        • R(a);OGATE::B(A),XP(c)
        • S(e);::QAB1(I)
      • Refutation
        • Q(i);XR(J)
    • Try
      • Q(I);CHECK,N_SPINS(F),P_SPINS(H)
      • Refutation
        • R(h);N_PINS(H),P_PINS(F),XQ(I)
    • Try
      • Q(I);CHECK,XP(f)
      • Vars
        • S(e);N_GUARD,P_SPINS(e)::QAB1(I),XS(e)
      • Refutation
        • Q(i);XQ(I)
  • Actual
    • Q(I);
    • Threat
      • QAR2(I)
    • Vars
      • Q(i);CHECK,OGATE,P_SPINQ(i),XS(H)::QAR1(I),XQ(i)
      • R(a);CHECK,OGATE,XP(C)::B(A),XR(a)
      • R(h);CHECK,OGATE,P_PINS(H),P_SPINR(h),XS(F)::R(E),XR(h)
      • Q(i);XR(J)::QAR(I)+S(H)
      • R(h);N_PINS(F),P_PINS(H),XR(J)::R(E)+S(F)
      • S(e);OGATE,XP(G)::QAR2(I),XS(e)
      • B(g);N_GUARD::QAB1(I),XB(g)
      • Q(i);::QAR(I)+S(H)
      • R(a);OGATE::B(A),XP(c)
      • R(h);N_PINS(F),P_PINS(H)::R(E)+S(F)
      • S(e);N_GUARD::QAB1(I),XS(e)
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