MESON Chess Problem Database
Problem Display
PID: 266122 (7K/2PRP2Q/R2B4/2pkN3/q7/1P4N1/8/8 w - - 0 1)
Shanshin, Valery Yurevich
Schweizerische Schachzeitung, 2017
#2
10 + 3
SOLUTION
- SOUND
- Sets
- 1...Kd4
- 2.Qd3#
- 1...Ke6
- 2.Qf7#
- 1...Qd4
- 2.Qg8#
- 2.Qf7#
- 1...Kd4
- Tries
- 1.Sf3?
- threat
- 2.Qf5#
- 2.Qg8#
- 2.Qf7#
- 1...Qa1+
- 2.Be5#
- 1...Qd4+
- 2.Be5#
- 1...Ke6
- 2.Qf5#
- 1...Qxb3
- 2.Qe4#
- 2.Qg8#
- 2.Qf7#
- 1...Qxd7
- 2.Qe4#
- 1...Qxa6
- 2.Qe4#
- 1...Qe4
- 2.Bf4#
- 2.Be5#
- 2.Qxe4#
- 1...Qf4
- 2.Bxf4#
- 2.Be5#
- 1...Qh4
- 2.Bf4#
- 2.Be5#
- 1...Qg4!
- threat
- 1.Sg4?
- 1...Qa1+
- 2.Be5#
- 1...Qd4+
- 2.Be5#
- 1...Kd4
- 2.Be5#
- 1...Ke6
- 2.Qf5#
- 1...Qxb3
- 2.Qe4#
- 1...Qxd7
- 2.Qe4#
- 1...Qxa6
- 2.Qe4#
- 1...Qb5
- 2.Qe4#
- 1...Qc6
- 2.Qe4#
- 1...Qa2
- 2.Bf4#
- 2.Be5#
- 2.Qe4#
- 1...Qa3
- 2.Bf4#
- 2.Be5#
- 2.Qe4#
- 1...Qb4
- 2.Bf4#
- 2.Be5#
- 1...Qc4
- 2.Bf4#
- 2.Be5#
- 1...Qe4
- 2.Bf4#
- 2.Be5#
- 2.Qxe4#
- 1...Qf4
- 2.Bxf4#
- 2.Be5#
- 1...Qa5
- 2.Bf4#
- 2.Be5#
- 2.Qe4#
- 1...c4
- 2.Qe4#
- 1...Qxg4!
- 1...Qa1+
- 1.Rxa4?
- threat
- 2.Qg8#
- 2.Qf7#
- 1...Ke6
- 2.Qf7#
- 1...c4!
- threat
- 1.bxa4?
- 1...Kd4
- 2.Qd3#
- 1...Ke6
- 2.Qf7#
- 1...c4!
- 1...Kd4
- 1.e8Q?
- 1...Kd4
- 2.Qd3#
- 1...Qxb3
- 2.Bf8#
- 2.Qe4#
- 1...Qxd7
- 2.Qd3#
- 2.Qe4#
- 1...Qxa6
- 2.Qe4#
- 1...Qb5
- 2.Qe4#
- 1...Qc6
- 2.Qd3#
- 2.Qe4#
- 1...Qa1
- 2.Bf8#
- 2.Qe4#
- 1...Qa2
- 2.Bf8#
- 2.Qd3#
- 2.Qe4#
- 1...Qa3
- 2.Bf8#
- 2.Qd3#
- 2.Qe4#
- 1...Qb4
- 2.Bf8#
- 1...Qc4
- 2.Bf8#
- 1...Qd4
- 2.Bf8#
- 2.Qhg8#
- 2.Qef7#
- 2.Qhf7#
- 2.Qeg8#
- 1...Qe4
- 2.Bf8#
- 2.Qxe4#
- 1...Qf4
- 2.Bf8#
- 1...Qh4
- 2.Bf8#
- 1...Qa5
- 2.Bf8#
- 2.Qd3#
- 2.Qe4#
- 1...c4
- 2.Qe4#
- 1...Qg4!
- 1...Kd4
- 1.e8R?
- 1...Kd4
- 2.Qd3#
- 1...Qxb3
- 2.Bf8#
- 2.Qe4#
- 1...Qxd7
- 2.Qd3#
- 2.Qe4#
- 1...Qxa6
- 2.Qe4#
- 1...Qb5
- 2.Qe4#
- 1...Qc6
- 2.Qd3#
- 2.Qe4#
- 1...Qa1
- 2.Bf8#
- 2.Qe4#
- 1...Qa2
- 2.Bf8#
- 2.Qd3#
- 2.Qe4#
- 1...Qa3
- 2.Bf8#
- 2.Qd3#
- 2.Qe4#
- 1...Qb4
- 2.Bf8#
- 1...Qc4
- 2.Bf8#
- 1...Qd4
- 2.Bf8#
- 2.Qg8#
- 2.Qf7#
- 1...Qe4
- 2.Bf8#
- 2.Qxe4#
- 1...Qf4
- 2.Bf8#
- 1...Qh4
- 2.Bf8#
- 1...Qa5
- 2.Bf8#
- 2.Qd3#
- 2.Qe4#
- 1...c4
- 2.Qe4#
- 1...Qg4!
- 1...Kd4
- 1.Sf3?
- Keys
- 1.Sc4!
- threat
- 2.Qe4#
- 1...Qa1+
- 2.Be5#
- 1...Kd4
- 2.Be5#
- 1...Ke6
- 2.Qf5#
- 1...Qxc4
- 2.Bf4#
- threat
- 1.Sc4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- K(c);N_GUARD,P-FLIGHT,S_CUTQ(a)::QAR1(I)
- K(c);N_GUARD,S_FLIGHT::QAB1(I)
- Tries
- Try
- S(C);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,N_GUARD::R(G)+B(E)
- K(c);S_FLIGHT::QAB1(I)
- Q(a);N_GUARD,XR(G)::QAB1(I)
- Q(a);N_GUARD,XR(D)::QAB1(I)
- Refutation
- Q(a);
- Try
- S(C);
- Vars
- Q(a);CHECK,N_GUARD::R(G)+B(E)
- K(c);P-FLIGHT::R(G)+B(E),DCHECK
- K(c);N_GUARD,S_FLIGHT::QAB1(I)
- Q(a);N_GUARD,XP(A)::QAB1(I)
- Q(a);N_GUARD,XR(G)::QAB1(I)
- Q(a);N_GUARD,XR(D)::QAB1(I)
- Q(a);N_GUARD::QAB1(I)
- P(b);S_CUTQ(a)::QAB1(I)
- Refutation
- Q(a);XS(C)
- Try
- R(D);XQ(a)
- Threat
- DUALS(2)
- Vars
- K(c);S_FLIGHT::QAB1(I)
- Refutation
- P(b);
- Try
- P(A);XQ(a)
- Vars
- K(c);N_GUARD,P-FLIGHT::QAR1(I)
- K(c);N_GUARD,S_FLIGHT::QAB1(I)
- Refutation
- P(b);
- Try
- P(H);
- Vars
- K(c);P-FLIGHT,S_CUTQ(a)::QAR1(I)
- Q(a);N_GUARD,XR(D)::QAB1(I)
- Q(a);N_GUARD::QAB1(I)
- Q(a);N_GUARD::R(G)+B(E)
- Q(a);N_GUARD,P_PINQ(I)::R(G)+B(E)
- P(b);S_CUTQ(a)::QAB1(I)
- Refutation
- Q(a);
- Try
- P(H);
- Vars
- K(c);P-FLIGHT,S_CUTQ(a)::QAR1(I)
- Q(a);N_GUARD,XR(D)::QAB1(I)
- Q(a);N_GUARD::QAB1(I)
- Q(a);N_GUARD::R(G)+B(E)
- Q(a);N_GUARD,P_PINQ(I)::R(G)+B(E)
- P(b);S_CUTQ(a)::QAB1(I)
- Refutation
- Q(a);
- Try
- Actual
- S(C);
- Threat
- QAB1(I)
- Vars
- Q(a);CHECK,N_GUARD::R(G)+B(E)
- K(c);P-FLIGHT::R(G)+B(E),DCHECK
- K(c);N_GUARD,S_FLIGHT::QAB1(I)
- Q(a);N_GUARD,XS(C)::R(G)+B(E)
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).