MESON Chess Problem Database
Problem Display
PID: 225149 (6B1/2qNp2K/2p5/1r1p3R/3Bkp2/2R3b1/3PP2n/nb4Q1 w - - 0 1)
Wirtanen, Erkki Aukusti
Suomen Shakki, 1933
#2
9 + 11
| 15148 | Sadier Collection | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Qa5
- 2.Re5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb6
- 2.Re5#
- 1...Qd8
- 2.Re5#
- 1...Qa7
- 2.Re5#
- 1...Qb7
- 2.Re5#
- 1...Qxd7
- 2.Re5#
- 1...Qc8
- 2.Re5#
- 1...Rb2
- 2.Sc5#
- 1...Rb3
- 2.Sc5#
- 1...Rb4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rb6
- 2.Sc5#
- 1...Rb7
- 2.Sc5#
- 1...Rb8
- 2.Sc5#
- 1...Ba2
- 2.d3#
- 1...Sc2
- 2.d3#
- 1...Sf3
- 2.exf3#
- 1...f3
- 2.Qe3#
- 1...c5
- 2.Bxd5#
- 1...Qa5
- Tries
- 1.Bb6?
- threat
- 2.Qd4#
- 1...Qxb6
- 2.Re5#
- 1...Rxb6
- 2.Sc5#
- 1...Qe5
- 2.Rxe5#
- 1...Rb4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Bf2
- 2.Qg6#
- 1...Sc2
- 2.d3#
- 1...Sb3
- 2.Qxb1#
- 1...Sf3
- 2.exf3#
- 1...d4
- 2.Qxd4#
- 1...c5
- 2.Bxd5#
- 1...e5!
- threat
- 1.Ba7?
- threat
- 2.Qd4#
- 1...Qxa7
- 2.Re5#
- 1...Qe5
- 2.Rxe5#
- 1...Qb6
- 2.Re5#
- 1...Rb4
- 2.Sc5#
- 1...Rc5
- 2.Sxc5#
- 1...Rb6
- 2.Sc5#
- 1...Bf2
- 2.Qg6#
- 1...Sc2
- 2.d3#
- 1...Sb3
- 2.Qxb1#
- 1...Sf3
- 2.exf3#
- 1...d4
- 2.Qxd4#
- 1...c5
- 2.Bxd5#
- 1...e5!
- threat
- 1.Bh8?
- threat
- 2.Qd4#
- 1...Qe5
- 2.Rxe5#
- 1...Qb6
- 2.Re5#
- 1...Qa7
- 2.Re5#
- 1...Rb4
- 2.Sc5#
- 1...Bf2
- 2.Qg6#
- 1...Sc2
- 2.d3#
- 1...Sb3
- 2.Qxb1#
- 1...Sf3
- 2.exf3#
- 1...d4
- 2.Qxd4#
- 1...c5
- 2.Bxd5#
- 1...e5!
- threat
- 1.Be6?
- threat
- 2.Bf5#
- 1...Qxd7
- 2.Re5#
- 1...f3
- 2.Qe3#
- 1...Qe5
- 2.Rxe5#
- 1...Bf2!
- threat
- 1.Re3+?
- 1...fxe3
- 2.Qxe3#
- 1...Kxd4+!
- 1...fxe3
- 1.Bb6?
- Keys
- 1.Bg7!
- threat
- 2.Qd4#
- 1...e5
- 2.Sf6#
- 1...Qe5
- 2.Rxe5#
- 1...Qb6
- 2.Re5#
- 1...Qa7
- 2.Re5#
- 1...Rb4
- 2.Sc5#
- 1...Bf2
- 2.Qg6#
- 1...Sc2
- 2.d3#
- 1...Sb3
- 2.Qxb1#
- 1...Sf3
- 2.exf3#
- 1...d4
- 2.Qxd4#
- 1...c5
- 2.Bxd5#
- threat
- 1.Bg7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 13
- Sets
- Q(j);N_GUARD::R1(F)
- Q(j);N_GUARD::R1(F),XQ(j)
- Q(j);N_GUARD,XS(G)::R1(F)
- R(g);N_GUARD::S(G)
- R(g);N_GUARD::S(G),XR(g)
- B(b);N_GUARD::P(B)
- S(a);S_CUTB(b)::P(B)
- S(c);OGATE::P(C),XS(c)
- P(f);N_GUARD::QAR1(A)
- P(i);N_GUARD,S_CUTR(g)::B(I),XP(h)
- Tries
- Try
- B(E);
- Threat
- QAR1(A)
- Vars
- Q(j);N_GUARD,XB(E)::R1(F)
- R(g);N_GUARD,XB(E)::S(G)
- Q(j);N_GUARD::R1(F),XQ(j)
- R(g);N_GUARD::S(G)
- R(g);N_GUARD::S(G),XR(g)
- B(d);OGATE::QAB(A)
- S(a);S_CUTB(b)::P(B)
- S(a);N_GUARD,S_CUTR(g)::QAB(A),XB(b)
- S(c);OGATE::P(C),XS(c)
- P(h);::QAR1(A),XP(h)
- P(i);N_GUARD,S_CUTR(g)::B(I),XP(h)
- Refutation
- P(k);P_PINS(G)
- Try
- B(E);
- Threat
- QAR1(A)
- Vars
- Q(j);N_GUARD,XB(E)::R1(F)
- Q(j);N_GUARD::R1(F),XQ(j)
- Q(j);N_GUARD::R1(F)
- R(g);N_GUARD::S(G)
- R(g);N_GUARD::S(G),XR(g)
- B(d);OGATE::QAB(A)
- S(a);S_CUTB(b)::P(B)
- S(a);N_GUARD,S_CUTR(g)::QAB(A),XB(b)
- S(c);OGATE::P(C),XS(c)
- P(h);::QAR1(A),XP(h)
- P(i);N_GUARD,S_CUTR(g)::B(I),XP(h)
- Refutation
- P(k);P_PINS(G)
- Try
- B(E);
- Threat
- QAR1(A)
- Vars
- Q(j);N_GUARD::R1(F),XQ(j)
- Q(j);N_GUARD::R1(F)
- R(g);N_GUARD::S(G)
- B(d);OGATE::QAB(A)
- S(a);S_CUTB(b)::P(B)
- S(a);N_GUARD,S_CUTR(g)::QAB(A),XB(b)
- S(c);OGATE::P(C),XS(c)
- P(h);::QAR1(A),XP(h)
- P(i);N_GUARD,S_CUTR(g)::B(I),XP(h)
- Refutation
- P(k);P_PINS(G)
- Try
- B(I);
- Threat
- B(I)
- Vars
- Q(j);N_GUARD,XS(G)::R1(F)
- P(f);N_GUARD::QAR1(A)
- Q(j);N_GUARD::R1(F),XQ(j)
- Refutation
- B(d);
- Try
- R(D);CHECK
- Vars
- P(f);OGATE,XR(D)::QAR1(A),XP(f)
- Refutation
- K(e);CHECK,P-FLIGHT,XB(E)
- Try
- Actual
- B(E);
- Threat
- QAR1(A)
- Vars
- P(k);N_GUARD::S(G)
- Q(j);N_GUARD::R1(F),XQ(j)
- Q(j);N_GUARD::R1(F)
- R(g);N_GUARD::S(G)
- B(d);OGATE::QAB(A)
- S(a);S_CUTB(b)::P(B)
- S(a);N_GUARD,S_CUTR(g)::QAB(A),XB(b)
- S(c);OGATE::P(C),XS(c)
- P(h);::QAR1(A),XP(h)
- P(i);N_GUARD,S_CUTR(g)::B(I),XP(h)
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).