MESON Chess Problem Database
Problem Display
PID: 199633 (k7/1R6/8/4br2/K1N2P2/Q3p3/p1p2B2/Nq5B w - - 0 1)
Dikusarov, Andrey Nikolayovich
Variantim, 1995
#2
8 + 7
SOLUTION
- SOUND
- Sets
- 1...Qxa1
- 2.Kb3#
- 2.Kb4#
- 2.Kb5#
- 2.Sb6#
- 1...Qc1
- 2.Sb6#
- 1...Qd1
- 2.Kb3#
- 2.Kb4#
- 2.Kb5#
- 2.Sb6#
- 1...Qe1
- 2.Sb6#
- 1...Qf1
- 2.Kb3#
- 2.Kb4#
- 2.Kb5#
- 2.Sb6#
- 1...Qg1
- 2.Kb3#
- 2.Kb4#
- 2.Kb5#
- 2.Sb6#
- 1...Qb3+
- 2.Kxb3#
- 1...Qb4+
- 2.Kxb4#
- 1...Qb5+
- 2.Kxb5#
- 1...Qb6
- 2.Sxb6#
- 1...Bb2
- 2.Sb6#
- 1...e2
- 2.Rxb1#
- 1...Qxa1
- Tries
- 1.Rb4+?
- 1...Qxh1
- 2.Kb3#
- 1...Ka7!
- 1...Qxh1
- 1.Rb5+?
- 1...Qxh1
- 2.Kb3#
- 2.Kb4#
- 1...Ka7!
- 1...Qxh1
- 1.Rb6+?
- 1...Qxh1
- 2.Kb3#
- 2.Kb4#
- 2.Kb5#
- 1...Ka7!
- 1...Qxh1
- 1.Rb8+?
- 1...Ka7
- 2.Ra8#
- 1...Kxb8!
- 1...Ka7
- 1.Qc5?
- threat
- 2.Rxb1#
- 2.Qa7#
- 2.Qa5#
- 1...Qb3+
- 2.Rxb3#
- 1...Qb4+
- 2.Rxb4#
- 1...Qb5+
- 2.Rxb5#
- 1...Qxa1
- 2.Sb6#
- 2.Rb1#
- 2.Qa7#
- 2.Qa5#
- 1...Qxh1
- 2.Qa7#
- 1...Rxf4
- 2.Qa7#
- 2.Qa5#
- 1...Bxa1
- 2.Qa7#
- 2.Qc8#
- 1...Bxf4
- 2.Qa7#
- 1...c1Q
- 2.Qa7#
- 2.Qa5#
- 1...c1R
- 2.Qa7#
- 2.Qa5#
- 1...Qc1
- 2.Sb6#
- 2.Qa7#
- 2.Qa5#
- 1...Qd1
- 2.Sb6#
- 2.Qa7#
- 2.Qa5#
- 1...Qe1
- 2.Sb6#
- 2.Qa7#
- 1...Qf1
- 2.Sb6#
- 2.Qa7#
- 2.Qa5#
- 1...Qg1
- 2.Sb6#
- 2.Qa7#
- 2.Qa5#
- 1...Qb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Qa7#
- 2.Qa5#
- 1...Qb6
- 2.Sxb6#
- 1...Rg5
- 2.Qa7#
- 2.Qa5#
- 1...Rh5
- 2.Qa7#
- 2.Qa5#
- 1...Rf6
- 2.Qa7#
- 1...Rf7
- 2.Qa7#
- 2.Qa5#
- 1...Bb2
- 2.Sb6#
- 2.Qa7#
- 2.Qc8#
- 1...Bc3
- 2.Qa7#
- 2.Qc8#
- 1...Bd4
- 2.Qc8#
- 1...Bd6
- 2.Qa7#
- 1...Bf6
- 2.Qa7#
- 2.Qc8#
- 1...Bc7
- 2.Qa7#
- 1...Bg7
- 2.Qa7#
- 2.Qc8#
- 1...Bb8
- 2.Ra7#
- 1...Bh8
- 2.Qa7#
- 2.Qc8#
- 1...Qxb7!
- threat
- 1.Qf8+?
- 1...Bb8
- 2.Qxb8#
- 1...Rxf8!
- 1...Bb8
- 1.Rb4+?
- Keys
- 1.Qxe3!
- threat
- 2.Rxb1#
- 2.Qa7#
- 1...Qb3+
- 2.Rxb3#
- 1...Qb4+
- 2.Rxb4#
- 1...Qb5+
- 2.Rxb5#
- 1...Qxa1
- 2.Sb6#
- 2.Rb1#
- 2.Qa7#
- 1...Qxh1
- 2.Qa7#
- 1...Qxb7
- 2.Qa7#
- 1...Rxf4
- 2.Qa7#
- 1...Bxa1
- 2.Qa7#
- 2.Qe8#
- 1...Bxf4
- 2.Qa7#
- 1...c1Q
- 2.Qa7#
- 1...c1R
- 2.Qa7#
- 1...Qc1
- 2.Sb6#
- 2.Qa7#
- 1...Qd1
- 2.Sb6#
- 2.Qa7#
- 1...Qe1
- 2.Sb6#
- 2.Qa7#
- 1...Qf1
- 2.Sb6#
- 2.Qa7#
- 1...Qg1
- 2.Sb6#
- 2.Qa7#
- 1...Qb2
- 2.Rxb2#
- 2.Rb3#
- 2.Rb4#
- 2.Rb5#
- 2.Qa7#
- 1...Qb6
- 2.Sxb6#
- 1...Rg5
- 2.Qa7#
- 1...Rh5
- 2.Qa7#
- 1...Rf6
- 2.Qa7#
- 1...Rf7
- 2.Qa7#
- 1...Bb2
- 2.Sb6#
- 2.Qa7#
- 2.Qe8#
- 1...Bc3
- 2.Qa7#
- 2.Qe8#
- 1...Bd4
- 2.Qe8#
- 1...Bd6
- 2.Qa7#
- 1...Bf6
- 2.Qa7#
- 1...Bc7
- 2.Qa7#
- 1...Bg7
- 2.Qa7#
- 2.Qe8#
- 1...Bb8
- 2.Ra7#
- 1...Bh8
- 2.Qa7#
- 2.Qe8#
- threat
- 1.Qxe3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 15
- REMOVED MATES = 4
- Sets
- Q(a);N_GUARD::S(F)
- Q(a);CHECK::QAR(D)+K(E),XQ(a)
- Q(a);N_GUARD::S(F),XQ(a)
- B(e);S_CUTQ(a)::S(F)
- P(d);::B(B)+R(H),XQ(a)
- Tries
- Try
- R(H);CHECK
- Vars
- Q(a);XB(B)::QAR(D)+K(E)
- Refutation
- K(g);P-FLIGHT,P_SPINP(d)
- Try
- R(H);CHECK
- Refutation
- K(g);P-FLIGHT,P_SPINP(d)
- Try
- R(H);CHECK
- Refutation
- K(g);P-FLIGHT
- Try
- R(H);CHECK
- Vars
- K(g);P-FLIGHT,P_SPINP(d)::R1(H)
- Refutation
- K(g);P-FLIGHT,XR(H)
- Try
- Q(D);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,N_GUARD::B(B)+R(H),XQ(a)
- Q(a);XB(B)::QAR1(D)
- B(e);XP(G)::QAR1(D)
- Q(a);N_GUARD::S(F),XQ(a)
- R(f);::QAR1(D)
- B(e);N_GUARD::QAR2(D)
- B(e);::QAR1(D)
- B(e);SBLOCK::B(B)+R(H),DCHECK
- Refutation
- Q(a);P_SPINQ(a),XR(H)
- Try
- Q(D);CHECK
- Vars
- B(e);N_GUARD,P_SPINB(e)::QAR1(D),XB(e)
- Refutation
- R(f);XQ(D)
- Try
- Actual
- Q(D);XP(d)
- Threat
- DUALS(2)
- Vars
- Q(a);CHECK,N_GUARD::B(B)+R(H),XQ(a)
- Q(a);XB(B)::QAR1(D)
- Q(a);P_SPINQ(a),XR(H)::QAR1(D)
- R(f);P_PINS(F),XP(G)::QAR1(D)
- B(e);XP(G)::QAR1(D)
- P(c);::QAR1(D)
- Q(a);N_GUARD::S(F),XQ(a)
- R(f);::QAR1(D)
- B(e);OGATE::QAR(D)
- B(e);::QAR1(D)
- B(e);SBLOCK::B(B)+R(H),DCHECK
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).