MESON Chess Problem Database
Problem Display
PID: 263702 (2bN2R1/4p3/4pkpp/2N2n1r/3P1Q1p/2p4p/K1Bn3P/8 w - - 0 1)
Dreijers, Albert
Zadachi i Etyudi, 2009
#2
8 + 12
SOLUTION
- SOUND
- Sets
- 1...Rg5
- 2.Qe5#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...Rg5
- Tries
- 1.Ka1?
- 1...Rg5
- 2.Qe5#
- 1...Ba6
- 2.Sd7#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...Sb3+!
- 1...Rg5
- 1.Scxe6?
- threat
- 2.Rf8#
- 2.Qe5#
- 1...Sf3
- 2.Rf8#
- 1...Sc4
- 2.Rf8#
- 1...g5
- 2.Qe5#
- 2.Qxf5#
- 1...Bxe6+!
- threat
- 1.Sdxe6?
- threat
- 2.Rf8#
- 1...Kf7
- 2.Rf8#
- 1...g5
- 2.Qxf5#
- 1...Bxe6+!
- threat
- 1.Bb1?
- 1...Sxb1
- 2.Se4#
- 1...Ba6
- 2.Sd7#
- 1...Rg5
- 2.Qe5#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sf1
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...c2!
- 1...Sxb1
- 1.Bd1?
- 1...Ba6
- 2.Sd7#
- 1...Rg5
- 2.Qe5#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...c2!
- 1...Ba6
- 1.Bb3?
- 1...Sxb3
- 2.Se4#
- 1...Ba6
- 2.Sd7#
- 1...Rg5
- 2.Qe5#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...c2!
- 1...Sxb3
- 1.Bd3?
- 1...Ba6
- 2.Sd7#
- 1...Rg5
- 2.Qe5#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...c2!
- 1...Ba6
- 1.Ba4?
- 1...Ba6
- 2.Sd7#
- 1...Rg5
- 2.Qe5#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...c2!
- 1...Ba6
- 1.Rg7?
- threat
- 2.Rf7#
- 1...g5
- 2.Qe5#
- 1...Kxg7!
- threat
- 1.Qxd2?
- threat
- 2.Se4#
- 1...Se3
- 2.Rxg6#
- 1...Bb7
- 2.Sd7#
- 1...Sg3
- 2.Rxg6#
- 1...Sd6
- 2.Rxg6#
- 1...Sg7
- 2.Rf8#
- 1...Sxd4!
- threat
- 1.Qg3?
- threat
- 2.Rxg6#
- 2.Qxg6#
- 1...Sxg3
- 2.Rxg6#
- 1...Sxd4
- 2.Rxg6#
- 1...Rg5
- 2.Qe5#
- 1...Sg7
- 2.Rf8#
- 2.Qxg6#
- 1...g5
- 2.Qe5#
- 1...hxg3!
- threat
- 1.Ka1?
- Keys
- 1.Qe3!
- 1...Sxe3
- 2.Rxg6#
- 1...Sxd4
- 2.Rxg6#
- 1...Ba6
- 2.Sd7#
- 1...Rg5
- 2.Qe5#
- 1...Bb7
- 2.Sd7#
- 1...Bd7
- 2.Sxd7#
- 1...Sb1
- 2.Se4#
- 1...Sf1
- 2.Se4#
- 1...Sb3
- 2.Se4#
- 1...Sf3
- 2.Se4#
- 1...Sc4
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sg3
- 2.Rxg6#
- 1...Sd6
- 2.Rxg6#
- 1...Sg7
- 2.Rf8#
- 1...e5
- 2.dxe5#
- 1...g5
- 2.Qe5#
- 1...Sxe3
- 1.Qe3!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 5
- REMOVED MATES = 0
- Sets
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Tries
- Try
- K(A);P-FLIGHT
- Vars
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Refutation
- S(a);CHECK
- Try
- S(F);XP(g)
- Threat
- DUALS(2)
- Vars
- S(a);::R(H)
- Refutation
- B(l);CHECK,XS(F)
- Try
- S(G);XP(g)
- Threat
- R(H)
- Vars
- K(h);P-FLIGHT::R1(H)
- P(i);N_GUARD,S_CUTR(f)::QAR1(E),XS(e)
- Refutation
- B(l);CHECK,XS(G)
- Try
- B(B);
- Vars
- S(a);N_GUARD,XB(B)::S(F)
- B(l);N_GUARD::S(F)
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- B(l);N_GUARD::S(F)
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- S(a);N_GUARD,XB(B)::S(F)
- B(l);N_GUARD::S(F)
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- B(l);N_GUARD::S(F)
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Refutation
- P(b);
- Try
- B(B);
- Vars
- B(l);N_GUARD::S(F)
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(E)
- Refutation
- P(b);
- Try
- R(H);
- Threat
- R1(H)
- Vars
- P(i);::QAB1(E)
- Refutation
- K(h);N_SPINS(e),S_FLIGHT,XR(H)
- Try
- Q(E);N_PINS(e),XS(a)
- Threat
- S(F)
- Vars
- S(e);::R1(H),XP(i)
- B(l);N_GUARD::S(F)
- S(e);SBLOCK::R(H)
- Refutation
- S(e);XP(D)
- Try
- Q(E);N_PINS(e)
- Threat
- DUALS(2)
- Vars
- S(e);XQ(E)::R1(H),XP(i)
- S(e);XP(D)::R1(H),XP(i)
- R(f);SBLOCK::QAB1(E)
- P(i);::QAB1(E)
- Refutation
- P(d);XQ(E)
- Try
- Actual
- Q(E);N_PINS(e)
- Vars
- S(e);XQ(E)::R1(H),XP(i)
- S(e);XP(D)::R1(H),XP(i)
- B(l);N_GUARD::S(F)
- R(f);SBLOCK::QAB1(E)
- B(l);N_GUARD::S(F),XB(l)
- S(a);N_GUARD::S(F)
- S(a);N_GUARD::S(F),XS(a)
- S(e);::R1(H),XP(i)
- S(e);SBLOCK::R(H)
- P(g);OGATE::P(D),XP(g)
- P(i);::QAB1(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).