MESON Chess Problem Database
Problem Display
PID: 70852 (B3R3/B1b4K/p7/qp1N1p2/2p4R/1n1k1N2/1P4Q1/3b1n2 w - - 0 1)
Leites, Samuil Davidovich
Schach, 1977
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qe1
- 2.Sxe1#
- 1...Qb4
- 2.Sxb4#
- 1...Qb6
- 2.Se1#
- 2.Sb4#
- 1...Qa1
- 2.Se1#
- 2.Sb4#
- 1...Qa2
- 2.Se1#
- 2.Sb4#
- 1...Qa3
- 2.Se1#
- 1...Qa4
- 2.Se1#
- 1...Bc2
- 2.Qxf1#
- 2.Qe2#
- 1...Be2
- 2.Qxe2#
- 1...Bf4
- 2.Sxf4#
- 1...Be5
- 2.Sxe5#
- 1...Bb6
- 2.Se5#
- 2.Sf4#
- 1...Bd8
- 2.Se5#
- 2.Sf4#
- 1...Sfd2
- 2.Se1#
- 1...Sh2
- 2.Re3#
- 1...Se3
- 2.Rxe3#
- 1...Sg3
- 2.Re3#
- 1...Sa1
- 2.Rd4#
- 1...Sc1
- 2.Rd4#
- 1...Sbd2
- 2.Se1#
- 1...Sd4
- 2.Rxd4#
- 1...Sc5
- 2.Rd4#
- 1...c3
- 2.Se1#
- 1...b4
- 2.Se1#
- 1...f4
- 2.Qg6#
- 1...Qe1
- Tries
- 1.Rh3?
- threat
- 2.Se1#
- 2.Se5#
- 1...Bxf3
- 2.Qe2#
- 1...Qd2
- 2.Se1#
- 1...Be2
- 2.Qxe2#
- 1...Be5
- 2.Se1#
- 2.Sxe5#
- 1...Sfd2
- 2.Se1#
- 1...Sbd2
- 2.Se1#
- 1...c3
- 2.Se5#
- 1...Qe1
- 2.Sxe1#
- 2.Se5#
- 1...Qb6
- 2.Sb4#
- 1...Bg3
- 2.Se5#
- 1...Bb6
- 2.Sf4#
- 1...Se3
- 2.Rxe3#
- 1...Sg3
- 2.Re3#
- 1...Sc5!
- threat
- 1.Re5?
- threat
- 2.Sf4#
- 1...Bxe5
- 2.Sxe5#
- 1...Be2
- 2.Qxe2#
- 1...Sfd2
- 2.Se1#
- 1...Sbd2
- 2.Se1#
- 1...c3
- 2.Se1#
- 1...f4
- 2.Sxf4#
- 2.Qg6#
- 1...Qd2!
- threat
- 1.Qxf1+?
- 1...Be2
- 2.Qxe2#
- 2.Qb1#
- 1...Kc2!
- 1...Be2
- 1.Qd2+?
- 1...Sfxd2
- 2.Se1#
- 1...Sbxd2
- 2.Se1#
- 1...Qxd2!
- 1...Sfxd2
- 1.Rh3?
- Keys
- 1.Rd8!
- threat
- 2.Sb4#
- 2.Sf4#
- 1...Bxd8
- 2.Se5#
- 2.Sf4#
- 1...Qd2
- 2.Sb4#
- 1...Be2
- 2.Sb4#
- 1...Bf4
- 2.Sb4#
- 2.Sxf4#
- 1...Sfd2
- 2.Se1#
- 2.Sb4#
- 1...Sbd2
- 2.Se1#
- 2.Sb4#
- 1...f4
- 2.Sb4#
- 2.Sxf4#
- 1...Qb4
- 2.Sxb4#
- 2.Sf4#
- 1...Qb6
- 2.Se1#
- 1...Bb6
- 2.Se5#
- 1...Bd6
- 2.Sf4#
- 1...Sd4
- 2.Rxd4#
- 1...Sc5
- 2.Rd4#
- 1...c3
- 2.Se1#
- 2.Sb4#
- 1...b4
- 2.Se1#
- 2.Sxb4#
- 2.Sf4#
- threat
- 1.Rd8!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 4
- REMOVED MATES = 16
- Sets
- Q(f);N_GUARD::S(C),XQ(f)
- Q(f);N_GUARD::S(E),XQ(f)
- Q(f);N_GUARD::S(C)
- B(a);N_GUARD::QAB1(B),XB(a)
- B(j);N_GUARD::S(E),XB(j)
- B(j);N_GUARD::S(C),XB(j)
- S(b);S_CUTQ(f)::S(C)
- S(b);N_GUARD::R1(I)
- S(b);N_GUARD::R1(I),XS(b)
- S(c);N_GUARD::R1(D)
- S(c);S_CUTQ(f)::S(C)
- S(c);N_GUARD::R1(D),XS(c)
- P(e);S_CUTQ(f)::S(C)
- P(g);S_CUTQ(f)::S(C)
- P(h);OGATEB::QAB(B)
- Tries
- Try
- R(D);
- Threat
- DUALS(2)
- Vars
- B(a);N_GUARD,P_SPINB(a),XS(C)::QAB1(B)
- Q(f);::R(D)+S(C),DCHECK
- B(a);N_GUARD::QAB1(B),XB(a)
- S(b);::R(D)+S(C),DCHECK
- S(c);::R(D)+S(C),DCHECK
- P(e);::R(D)+S(C),DCHECK
- Q(f);N_GUARD::S(E)
- B(j);::S(C)
- B(j);N_GUARD::S(E)
- S(b);N_GUARD::R1(I),XS(b)
- S(b);N_GUARD::R1(I)
- Refutation
- S(c);
- Try
- R(I);
- Threat
- S(E)
- Vars
- B(j);XR(I)::S(C),XB(j)
- B(a);N_GUARD::QAB1(B),XB(a)
- S(b);S_CUTQ(f)::S(C)
- S(c);S_CUTQ(f)::S(C)
- P(e);S_CUTQ(f)::S(C)
- Refutation
- Q(f);
- Try
- Q(B);CHECK,XS(b)
- Refutation
- K(d);S_FLIGHT
- Try
- Q(B);CHECK
- Vars
- S(b);SBLOCK,XQ(B)::S(C)
- S(c);SBLOCK,XQ(B)::S(C)
- Refutation
- Q(f);XQ(B)
- Try
- Actual
- R(I);
- Threat
- DUALS(2)
- Vars
- Q(f);::R(I)+S(E),DCHECK
- B(a);::R(I)+S(E),DCHECK
- Q(f);N_GUARD::S(C)
- B(j);N_GUARD::S(C)
- B(j);::S(E)
- S(c);N_GUARD::R1(D),XS(c)
- S(c);N_GUARD::R1(D)
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).