MESON Chess Problem Database

Problem Display
PID: 51894 (Q7/8/4Kn2/2p1Npp1/1pBknb1R/7b/4Rpq1/3N4 w - - 0 1)

Hirschenson, Aaron

StrateGems, 2004

Q7/8/4Kn2/2p1Npp1/1pBknb1R/7b/4Rpq1/3N4

#2

7 + 11

SOLUTION

  • SOUND
  • Sets
    • 1...Bd2
      • 2.Rxd2#
    • 1...Bh2
      • 2.Rd2#
      • 2.Qa1#
    • 1...Be3
      • 2.Qa1#
    • 1...Bg3
      • 2.Rd2#
      • 2.Qa1#
    • 1...Sd2
      • 2.Rxd2#
      • 2.Qa1#
    • 1...Sc3
      • 2.Rd2#
    • 1...Sg3
      • 2.Rd2#
      • 2.Qa1#
    • 1...Sd6
      • 2.Rd2#
      • 2.Qa1#
    • 1...Sg4
      • 2.Qd5#
    • 1...Sd5
      • 2.Qxd5#
    • 1...Sh5
      • 2.Qd5#
    • 1...Sd7
      • 2.Qd5#
    • 1...Sh7
      • 2.Qd5#
    • 1...Se8
      • 2.Qd5#
    • 1...Sg8
      • 2.Qd5#
  • Tries
    • 1.Bb5?
      • threat
        • 2.Sc6#
      • 1...Bxe5
        • 2.Rd2#
        • 2.Qa1#
      • 1...Sd2
        • 2.Rxd2#
        • 2.Qa1#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sg3
        • 2.Rd2#
        • 2.Qa1#
      • 1...Sd6
        • 2.Rd2#
        • 2.Qa1#
      • 1...c4!
    • 1.Ba6?
      • threat
        • 2.Sc6#
      • 1...Bxe5
        • 2.Rd2#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sg3
        • 2.Rd2#
      • 1...Sd6
        • 2.Rd2#
      • 1...c4!
    • 1.Rxe4+?
      • 1...Qxe4
        • 2.Qa1#
      • 1...Sxe4
        • 2.Qd5#
      • 1...fxe4+!
    • 1.Qa2?
      • threat
        • 2.Sc6#
      • 1...Bxe5
        • 2.Rd2#
      • 1...Sd2
        • 2.Qa1#
        • 2.Qb2#
        • 2.Qxd2#
      • 1...Sc3
        • 2.Qd2#
      • 1...Sg3
        • 2.Qa1#
        • 2.Qb2#
        • 2.Qd2#
      • 1...Sd6
        • 2.Qa1#
        • 2.Qb2#
        • 2.Qd2#
      • 1...b3!
    • 1.Qa6?
      • threat
        • 2.Sc6#
      • 1...Bxe5
        • 2.Rd2#
      • 1...Sd2
        • 2.Qa1#
      • 1...Sg3
        • 2.Qa1#
      • 1...Sd6
        • 2.Qa1#
      • 1...Sc3!
  • Keys
    • 1.Rc2!
      • threat
        • 2.Sc6#
      • 1...Bxe5
        • 2.Qa1#
      • 1...Sd2
        • 2.Rxd2#
      • 1...Sc3
        • 2.Rd2#
      • 1...Sg3
        • 2.Rd2#
      • 1...Sd6
        • 2.Rd2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 9
  • Sets
    • B(g);N_GUARD,P_SPINS(f)::R(B),XB(g)
    • B(g);P_SPINS(f)::QAB(G)
    • S(f);N_GUARD,P_SPINB(g)::R(B)
    • S(k);N_GUARD::QAR1(G)
    • S(k);N_GUARD::QAR1(G),XS(k)
  • Tries
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • S(f);N_GUARD,P_SPINB(g)::R(B)
      • Refutation
        • P(h);
    • Try
      • B(C);
      • Threat
        • S(E)
      • Vars
        • B(g);N_GUARD,P_SPINS(f),XS(E)::R(B)
        • S(f);N_GUARD,P_SPINB(g)::R(B),XS(f)
        • S(f);N_GUARD,P_SPINB(g)::R(B)
      • Refutation
        • P(h);
    • Try
      • R(B);CHECK,XS(f)
      • Vars
        • Q(b);P_PINS(E),SBLOCK,XR(B)::QAB(G)
        • S(k);XR(B)::QAR1(G)
      • Refutation
        • P(i);CHECK,XR(B)
    • Try
      • Q(G);
      • Threat
        • S(E)
      • Vars
        • B(g);N_GUARD,P_SPINS(f),XS(E)::R(B)
        • S(f);N_GUARD,P_SPINB(g)::QAR2(G)
      • Refutation
        • P(d);
    • Try
      • Q(G);
      • Threat
        • S(E)
      • Vars
        • B(g);N_GUARD,P_SPINS(f),XS(E)::R(B)
        • S(f);N_GUARD,P_SPINB(g)::QAB(G)
      • Refutation
        • S(f);P_SPINB(g)
  • Actual
    • R(B);
    • Threat
      • S(E)
    • Vars
      • B(g);P_SPINS(f),XS(E)::QAB(G)
      • S(f);N_GUARD,P_SPINB(g)::R(B),XS(f)
      • S(f);N_GUARD,P_SPINB(g)::R(B)
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