MESON Chess Problem Database

Problem Display
PID: 153430 (q2Nn3/R1p5/bp6/k2r1r2/2pB4/P1N5/4Qp2/5K2 w - - 0 1)

Hirschenson, Aaron

StrateGems, 2012

q2Nn3/R1p5/bp6/k2r1r2/2pB4/P1N5/4Qp2/5K2

#2

7 + 10

SOLUTION

  • SOUND
  • Sets
    • 1...Qc6
      • 2.Sxc6#
    • 1...Qb7
      • 2.Sxb7#
    • 1...Qxa7
      • 2.Sc6#
    • 1...Qb8
      • 2.Sc6#
    • 1...Qc8
      • 2.Sc6#
  • Tries
    • 1.Rxa6+?
      • 1...Qxa6
        • 2.Sc6#
      • 1...Kxa6!
    • 1.Rxa8?
      • threat
        • 2.Sc6#
        • 2.Sb7#
      • 1...Rc5
        • 2.Sb7#
      • 1...Rd6
        • 2.Sb7#
      • 1...Rf6
        • 2.Sb7#
      • 1...Sd6
        • 2.Sc6#
      • 1...c6
        • 2.Sxc6#
        • 2.Sb7#
      • 1...Rxd8!
    • 1.Qd1?
      • threat
        • 2.Qa4#
      • 1...Qc6
        • 2.Sxc6#
      • 1...b5!
    • 1.Qb2?
      • threat
        • 2.Qb4#
      • 1...c5
        • 2.Qb5#
      • 1...Rb5!
    • 1.Qc2?
      • threat
        • 2.Qa4#
      • 1...Qc6
        • 2.Sxc6#
      • 1...b5!
  • Keys
    • 1.Qxc4!
      • threat
        • 2.Qxa6#
      • 1...Qxa7
        • 2.Sc6#
      • 1...Qb7
        • 2.Sxb7#
      • 1...Qc8
        • 2.Sc6#
      • 1...Rb5
        • 2.Qa4#
      • 1...b5
        • 2.Qb4#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 2
  • Sets
    • Q(i);N_GUARD::S(G),XQ(i)
    • Q(i);N_GUARD,N_SPINB(f),XR(F)::S(G)
    • Q(i);N_GUARD::S(G)
  • Tries
    • Try
      • R(F);CHECK,XB(f)
      • Vars
        • Q(i);SBLOCK,XR(F)::S(G)
      • Refutation
        • K(c);P-FLIGHT,P_SPINP(b),XR(F)
    • Try
      • R(F);XQ(i)
      • Threat
        • DUALS(2)
      • Vars
        • R(d);::S(G)
        • R(e);::S(G)
        • S(j);::S(G)
      • Refutation
        • R(d);XS(G)
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(i);N_GUARD::S(G),XQ(i)
      • Refutation
        • P(g);
    • Try
      • Q(B);
      • Threat
        • QAB1(B)
      • Vars
        • P(h);S_CUTR(d)::QAR1(B)
      • Refutation
        • R(d);
    • Try
      • Q(B);
      • Threat
        • QAR1(B)
      • Vars
        • Q(i);N_GUARD::S(G),XQ(i)
      • Refutation
        • P(g);
  • Actual
    • Q(B);P_SPINQ(B),XP(b)
    • Threat
      • QAR1(B),XB(f)
    • Vars
      • Q(i);N_GUARD,N_SPINB(f),XR(F)::S(G)
      • Q(i);N_GUARD::S(G),XQ(i)
      • Q(i);N_GUARD::S(G)
      • R(d);N_PINQ(B)::QAR1(B)
      • P(g);N_PINQ(B)::QAB1(B)
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