MESON Chess Problem Database
Problem Display
PID: 206057 (3nK3/BP1Rp3/2k5/bpp5/R5Q1/2Nn1N1p/7q/4rB2 w - - 0 1)
Valtonen, Kari
Tehtavaniekka, 2018
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Qg1
- 2.b8S#
- 1...Qh1
- 2.b8S#
- 1...Qa2
- 2.b8S#
- 1...Qb2
- 2.b8S#
- 1...Qc2
- 2.b8S#
- 1...Qd2
- 2.b8S#
- 1...Qe2
- 2.b8S#
- 1...Qf2
- 2.b8S#
- 1...Qg2
- 2.b8S#
- 1...Ra1
- 2.Qe4#
- 1...Rb1
- 2.Qe4#
- 1...Rc1
- 2.Qe4#
- 1...Rd1
- 2.Qe4#
- 1...Rxf1
- 2.Qe4#
- 1...Re4
- 2.Qxe4#
- 1...Re5
- 2.b8S#
- 1...Bxc3
- 2.Ra6#
- 1...Bb4
- 2.Ra6#
- 1...Sc1
- 2.Bxb5#
- 1...Sb2
- 2.Bxb5#
- 1...Sf2
- 2.Bxb5#
- 1...Sb4
- 2.Bxb5#
- 1...Sf4
- 2.Bxb5#
- 2.b8S#
- 1...Se5
- 2.Bxb5#
- 2.b8S#
- 1...bxa4
- 2.Qxa4#
- 1...c4
- 2.Sd4#
- 1...e5
- 2.b8S#
- 1...Qg1
- Tries
- 1.Se5+?
- 1...Rxe5
- 2.b8S#
- 1...Sxe5
- 2.Bxb5#
- 2.b8S#
- 1...Qxe5!
- 1...Rxe5
- 1.Bg2?
- threat
- 2.Sd4#
- 2.Se5#
- 1...Qxg2
- 2.b8S#
- 1...Qe5
- 2.Sd4#
- 2.Sxe5#
- 1...Re4
- 2.Qxe4#
- 1...Re5
- 2.Sd4#
- 2.Sxe5#
- 2.b8S#
- 1...Se5
- 2.Sd4#
- 2.Sxe5#
- 2.b8S#
- 1...e5
- 2.Sd4#
- 2.Sxe5#
- 2.b8S#
- 1...hxg2!
- threat
- 1.Rxa5?
- threat
- 2.Ra6#
- 1...Qa2
- 2.b8S#
- 1...Ra1
- 2.Qe4#
- 1...Sb4
- 2.Bxb5#
- 1...Qc7!
- threat
- 1.Qc4?
- threat
- 2.Sd4#
- 2.Qxb5#
- 2.Qd5#
- 1...Bxc3
- 2.Ra6#
- 2.Qd5#
- 1...bxa4
- 2.Sd4#
- 2.Qb5#
- 2.Qd5#
- 2.Qxa4#
- 1...Qc7
- 2.Qxb5#
- 2.Qd5#
- 1...Bc7
- 2.Qxb5#
- 2.Qd5#
- 1...Qd6
- 2.Qxb5#
- 1...Qg1
- 2.Qxb5#
- 2.Qd5#
- 2.b8S#
- 1...Qf4
- 2.Qxb5#
- 2.Qd5#
- 1...Qe5
- 2.Qxb5#
- 1...Qa2
- 2.Sd4#
- 2.Qxb5#
- 2.b8S#
- 1...Qb2
- 2.Sd4#
- 2.Qd5#
- 2.b8S#
- 1...Qf2
- 2.Qxb5#
- 2.Qd5#
- 2.b8S#
- 1...Rb1
- 2.Sd4#
- 2.Qd5#
- 2.Qe4#
- 1...Re4
- 2.Qxb5#
- 2.Qd5#
- 2.Qxe4#
- 1...Re5
- 2.Sd4#
- 2.Qxb5#
- 2.b8S#
- 1...Sb4
- 2.Sd4#
- 2.Qxb5#
- 2.Qxc5#
- 1...Sf4
- 2.Sd4#
- 2.Qxb5#
- 2.Qxc5#
- 2.b8S#
- 1...Se6
- 2.Qxb5#
- 2.Qd5#
- 1...b4
- 2.Sd4#
- 2.Qb5#
- 2.Qd5#
- 1...e5
- 2.Qxb5#
- 2.Qd5#
- 2.b8S#
- 1...e6
- 2.Sd4#
- 2.Qxb5#
- 1...bxc4!
- threat
- 1.Se5+?
- Keys
- 1.Qb4!
- threat
- 2.Qxb5#
- 1...Bxb4
- 2.Ra6#
- 1...Sxb4
- 2.Bxb5#
- 1...bxa4
- 2.Qxa4#
- 2.Qb5#
- 1...cxb4
- 2.Sd4#
- 1...Qb2
- 2.b8S#
- 1...Rb1
- 2.Qe4#
- threat
- 1.Qb4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 21
- Sets
- Q(b);N_GUARD::P=S
- R(a);N_GUARD::QAB(E)
- R(a);N_GUARD,XB(A)::QAB(E)
- R(a);N_GUARD::QAB(E),XR(a)
- R(a);S_CUTQ(b)::P=S
- B(e);OGATE,XS(B)::R(D)
- B(e);OGATE::R(D)
- S(c);OGATE::B(A),XP(f)
- P(f);OGATE,XR(D)::QAB(E),XP(f)
- P(g);N_GUARD::S(C)
- P(i);S_CUTQ(b)::P=S
- Tries
- Try
- S(C);CHECK
- Vars
- R(a);N_GUARD,S_CUTQ(b),S_CUTS(c),XS(C)::P=S
- Refutation
- Q(b);XS(C)
- Try
- B(A);
- Threat
- DUALS(2)
- Vars
- Q(b);N_GUARD,XB(A)::P=S
- R(a);N_GUARD::QAB(E),XR(a)
- Refutation
- P(d);XB(A)
- Try
- R(D);XB(e)
- Threat
- R(D)
- Vars
- Q(b);N_GUARD::P=S
- R(a);N_GUARD::QAB(E)
- S(c);OGATE::B(A),XP(f)
- Refutation
- Q(b);
- Try
- Q(E);P_PINP(g)
- Threat
- DUALS(3)
- Vars
- Q(b);::QAB1(E),XP(f)
- Refutation
- P(f);N_SPINP(g),XQ(E)
- Try
- Actual
- Q(E);
- Threat
- QAB1(E),XP(f)
- Vars
- B(e);OGATE,XQ(E)::R(D)
- S(c);OGATE,XQ(E)::B(A),XP(f)
- P(g);N_GUARD,XQ(E)::S(C)
- Q(b);N_GUARD::P=S
- R(a);N_GUARD::QAB(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).