MESON Chess Problem Database

Problem Display
PID: 269679 (2b2rn1/4Q3/3p3p/3p1R2/5N2/5k2/3q1N1P/2B2R1K w - - 0 1)

Shanshin, Valery Yurevich

Shakhmatnaya kompozitsiya, 1997

2b2rn1/4Q3/3p3p/3p1R2/5N2/5k2/3q1N1P/2B2R1K

#2

8 + 8

SOLUTION

  • SOUND
  • Sets
    • 1...Qxc1
      • 2.Qe2#
    • 1...Qc3
      • 2.Qe2#
    • 1...Qe3
      • 2.Qxe3#
    • 1...Qb4
      • 2.Qe2#
      • 2.Qe3#
    • 1...Qxf4
      • 2.Qe3#
    • 1...Qa5
      • 2.Qe2#
      • 2.Qe3#
    • 1...Qd1
      • 2.Qe3#
    • 1...Qa2
      • 2.Qe3#
    • 1...Qb2
      • 2.Qe3#
    • 1...Qc2
      • 2.Qe3#
    • 1...Qe2
      • 2.Qxe2#
    • 1...Qxf2
      • 2.Qe2#
    • 1...Qd4
      • 2.Qe2#
    • 1...d4
      • 2.Qe4#
  • Tries
    • 1.Sd1+?
      • 1...Qf2
        • 2.Qe2#
      • 1...Kg4!
    • 1.S2d3+?
      • 1...Qf2
        • 2.Qe2#
      • 1...Kg4!
    • 1.S2h3+?
      • 1...Qf2
        • 2.Qe2#
      • 1...Kg4!
    • 1.Sg4+?
      • 1...Qf2
        • 2.Qe2#
      • 1...Kxg4!
    • 1.Sxd5+?
      • 1...Qf4
        • 2.Qe3#
        • 2.Qe4#
      • 1...Rxf5
        • 2.Qe4#
      • 1...Bxf5!
  • Keys
    • 1.Qg7!
      • threat
        • 2.Qg3#
      • 1...Ke3
        • 2.Qc3#
      • 1...Qxf4
        • 2.Qg4#
      • 1...Qxf2
        • 2.Qg2#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 1
    • REMOVED MATES = 10
  • Sets
    • Q(a);N_GUARD,P_PINR(B),XB(A)::QAB1(H)
    • Q(a);N_GUARD::QAB1(H)
    • Q(a);N_GUARD::QAR1(H),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XS(F)::QAR1(H)
    • Q(a);N_GUARD,P_PINR(B)::QAR1(H)
    • Q(a);N_GUARD::QAR1(H)
    • Q(a);N_GUARD::QAB1(H),XQ(a)
    • Q(a);N_GUARD,P_SPINQ(a),XS(D)::QAB1(H)
    • P(c);N_GUARD::QAB1(H)
  • Tries
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT
    • Try
      • S(D);CHECK
      • Vars
        • Q(a);P_SPINQ(a)::QAB1(H)
      • Refutation
        • K(b);S_FLIGHT,XS(D)
    • Try
      • S(F);CHECK,XP(c)
      • Vars
        • R(g);XR(G)::QAB1(H)
      • Refutation
        • B(f);XR(G)
  • Actual
    • Q(H);
    • Threat
      • QAR1(H)
    • Vars
      • K(b);P-FLIGHT,P_SPINQ(a)::QAR2(H)
      • Q(a);P_SPINQ(a),XS(F)::QAB1(H)
      • Q(a);P_SPINQ(a),XS(D)::QAB1(H)
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