MESON Chess Problem Database
Problem Display
PID: 245708 (2nN2R1/1b1P4/r1p1R3/Qr2Nkpq/1b1Bp1pP/3PP3/4B3/3K4 w - - 0 1)
Wirtanen, Erkki Aukusti
Shakhmaty (Riga), 1962
#2
12 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qg6
- 2.Bxg4#
- 1...Qf7
- 2.Bxg4#
- 2.Rxg5#
- 1...Qe8
- 2.Bxg4#
- 2.Rxg5#
- 1...Qh6
- 2.Bxg4#
- 1...Qh7
- 2.Bxg4#
- 2.Rxg5#
- 1...Qh8
- 2.Bxg4#
- 2.Rxg5#
- 1...Rxe5
- 2.Qxe5#
- 1...exd3
- 2.Bxd3#
- 1...Qg6
- Tries
- 1.Sc4?
- threat
- 2.Rf6#
- 2.dxe4#
- 1...exd3
- 2.Bxd3#
- 1...Qg6
- 2.dxe4#
- 1...Qf7
- 2.Rxg5#
- 2.dxe4#
- 1...Qh6
- 2.dxe4#
- 1...Qh8
- 2.Rxg5#
- 2.dxe4#
- 1...Re5
- 2.Qxe5#
- 1...Be7
- 2.dxe4#
- 1...Sd6
- 2.Rf6#
- 1...c5!
- threat
- 1.Sxg4?
- threat
- 2.Rf6#
- 2.dxe4#
- 1...Qxg4
- 2.Rf6#
- 1...Qg6
- 2.dxe4#
- 1...Qf7
- 2.Sh6#
- 2.Rxg5#
- 2.dxe4#
- 1...Qh6
- 2.Sxh6#
- 2.dxe4#
- 1...Qh8
- 2.Rxg5#
- 2.dxe4#
- 1...Re5
- 2.Rxe5#
- 2.Rf6#
- 2.Qxe5#
- 1...Be7
- 2.dxe4#
- 1...Sd6
- 2.Rf6#
- 1...c5
- 2.Re5#
- 1...exd3!
- threat
- 1.Sg6?
- threat
- 2.Rf6#
- 2.dxe4#
- 1...Qxg6
- 2.dxe4#
- 1...exd3
- 2.Bxd3#
- 2.e4#
- 1...Qh8
- 2.dxe4#
- 1...Re5
- 2.Qxe5#
- 1...Be7
- 2.dxe4#
- 1...Sd6
- 2.Se7#
- 2.Rf6#
- 1...c5
- 2.Rf8#
- 1...gxh4!
- threat
- 1.Sef7?
- threat
- 2.Rf6#
- 2.dxe4#
- 1...Qxf7
- 2.Rxg5#
- 2.dxe4#
- 1...exd3
- 2.Bxd3#
- 1...Qg6
- 2.dxe4#
- 1...Qh6
- 2.Sxh6#
- 2.dxe4#
- 1...Qh8
- 2.Rxg5#
- 2.dxe4#
- 1...Re5
- 2.Qxe5#
- 1...Be7
- 2.dxe4#
- 1...Sd6
- 2.Rf6#
- 1...c5!
- threat
- 1.Rgg6?
- threat
- 2.Ref6#
- 2.Rgf6#
- 1...Qxg6
- 2.Bxg4#
- 1...exd3
- 2.Bxd3#
- 1...gxh4
- 2.Ref6#
- 1...c5
- 2.Rgf6#
- 1...Qh6
- 2.Bxg4#
- 2.Ref6#
- 1...Qh8
- 2.Bxg4#
- 2.Rxg5#
- 1...Be7!
- threat
- 1.Rf8+?
- 1...Qf7
- 2.Bxg4#
- 2.Rxf7#
- 1...Bxf8!
- 1...Qf7
- 1.Sc4?
- Keys
- 1.Sexc6!
- threat
- 2.Rf6#
- 2.dxe4#
- 1...Rxc6
- 2.dxe4#
- 1...Bxc6
- 2.Rf6#
- 1...exd3
- 2.Bxd3#
- 1...Qg6
- 2.dxe4#
- 1...Qf7
- 2.Rxg5#
- 2.dxe4#
- 1...Qh6
- 2.dxe4#
- 1...Qh8
- 2.Rxg5#
- 2.dxe4#
- 1...Re5
- 2.Qxe5#
- 1...Be7
- 2.dxe4#
- 1...Sd6
- 2.Se7#
- 2.Rf6#
- threat
- 1.Sexc6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 2
- ADDED MATES = 3
- REMOVED MATES = 0
- Sets
- Q(g);N_GUARD::B(B),XP(c)
- R(d);OGATE,P_SPINR(d),XS(H)::QAR1(G),XR(d)
- P(b);OGATE,XP(C)::B(B),XP(b)
- Tries
- Try
- S(H);P_PINR(d)
- Threat
- DUALS(2)
- Vars
- P(b);OGATE,XP(C)::B(B),XP(b)
- Q(g);::P(C),XP(b)
- R(d);OGATE::QAR1(G),XR(d)
- B(a);::P(C),XP(b)
- S(k);::R1(I)
- Refutation
- P(i);N_SPINR(d)
- Try
- S(H);P_PINR(d),XP(c)
- Threat
- DUALS(2)
- Vars
- Q(g);P_PINB(B),XS(H)::R1(I)
- Q(g);::P(C),XP(b)
- B(a);::P(C),XP(b)
- S(k);::R1(I)
- P(i);N_SPINR(d),S_CUTR(d)::R1(I)
- Refutation
- P(b);XP(C)
- Try
- S(H);P_PINR(d)
- Threat
- DUALS(2)
- Vars
- Q(g);XS(H)::P(C),XP(b)
- Q(g);::P(C),XP(b)
- R(d);OGATE::QAR1(G),XR(d)
- B(a);::P(C),XP(b)
- P(i);N_SPINR(d),S_CUTB(a)::R(L)
- Refutation
- P(f);XP(F)
- Try
- S(H);P_PINR(d)
- Threat
- DUALS(2)
- Vars
- P(b);OGATE,XP(C)::B(B),XP(b)
- Q(g);::P(C),XP(b)
- R(d);OGATE::QAR1(G),XR(d)
- B(a);::P(C),XP(b)
- S(k);::R1(I)
- Refutation
- P(i);N_SPINR(d)
- Try
- R(L);
- Threat
- DUALS(2)
- Vars
- Q(g);N_GUARD,XR(L)::B(B),XP(c)
- P(b);OGATE,XP(C)::B(B),XP(b)
- P(f);XP(F)::R1(I)
- P(i);::R1(L)
- Refutation
- B(a);
- Try
- R(L);CHECK
- Refutation
- B(a);XR(L)
- Try
- Actual
- S(H);P_PINR(d),XP(i)
- Threat
- DUALS(2)
- Vars
- R(h);XS(H)::P(C),XP(b)
- B(j);XS(H)::R1(I)
- P(b);OGATE,XP(C)::B(B),XP(b)
- Q(g);::P(C),XP(b)
- R(d);OGATE::QAR1(G),XR(d)
- B(a);::P(C),XP(b)
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).