MESON Chess Problem Database
Problem Display
PID: 245679 (4Q3/1n3b2/1Npr3p/4R1n1/3k1p2/BR2p3/KP4qb/1BN5 w - - 0 1)
Wirtanen, Erkki Aukusti
Norsk Sjakkblad, 1934
#2
9 + 11
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Qh1
- 2.Se2#
- 1...Qh3
- 2.Se2#
- 1...Qe4
- 2.Se2#
- 1...Qd5
- 2.Se2#
- 1...Qg1
- 2.Se2#
- 1...Qxb2+
- 2.Bxb2#
- 1...Qe2
- 2.Sxe2#
- 1...Qg3
- 2.Se2#
- 1...Rd5
- 2.Rd3#
- 1...Bxb3+
- 2.Sxb3#
- 1...Bh5
- 2.Rd3#
- 2.Rb4#
- 1...Bg6
- 2.Rb4#
- 1...Sf3
- 2.Re4#
- 1...Sa5
- 2.Bc5#
- 1...Sc5
- 2.Bxc5#
- 1...Sd8
- 2.Bc5#
- 1...Qh1
- Tries
- 1.Rxe3?
- threat
- 2.Rd3#
- 2.Qe5#
- 1...Bxb3+
- 2.Sxb3#
- 1...Bxe8
- 2.Rbd3#
- 1...fxe3
- 2.Qxe3#
- 1...Qf1
- 2.Qe5#
- 1...Qf3
- 2.Qe5#
- 1...Qh3
- 2.Se2#
- 2.Qe5#
- 1...Qe4
- 2.Se2#
- 1...Qd5
- 2.Se2#
- 2.Rd3#
- 1...Qc2
- 2.Qe5#
- 1...Qd2
- 2.Qe5#
- 1...Qe2
- 2.Sxe2#
- 2.Qe5#
- 1...Qg3
- 2.Se2#
- 2.Qe5#
- 1...Rd5
- 2.Rbd3#
- 2.Red3#
- 1...Re6
- 2.Rbd3#
- 1...Bc4
- 2.Qe5#
- 1...Be6
- 2.Qh8#
- 1...Bg6
- 2.Qe5#
- 1...Sf3
- 2.Rd3#
- 2.Re4#
- 2.Qe4#
- 1...Se4
- 2.Rd3#
- 1...Se6
- 2.Rbd3#
- 1...Sc5
- 2.Qe5#
- 1...f3
- 2.Rd3#
- 1...Qxb2+!
- threat
- 1.Re4+?
- 1...Qxe4
- 2.Se2#
- 1...Sxe4!
- 1...Qxe4
- 1.Rd5+?
- 1...Qxd5
- 2.Se2#
- 1...Rxd5
- 2.Rd3#
- 1...cxd5
- 2.Rd3#
- 1...Bxd5!
- 1...Qxd5
- 1.Rxg5?
- threat
- 2.Qe5#
- 1...Qxb2+
- 2.Bxb2#
- 1...Bxb3+
- 2.Sxb3#
- 1...Qxg5
- 2.Se2#
- 2.Qe4#
- 1...Bxe8
- 2.Rb4#
- 1...Qe4
- 2.Se2#
- 2.Qxe4#
- 1...Qd5
- 2.Se2#
- 1...Rd5
- 2.Rd3#
- 1...Re6
- 2.Rb4#
- 1...Be6
- 2.Qh8#
- 1...f3
- 2.Qxe3#
- 2.Qe4#
- 1...hxg5!
- threat
- 1.Qh8?
- threat
- 2.Re4#
- 2.Rd5#
- 2.Re6#
- 1...Qxb2+
- 2.Bxb2#
- 1...Bxb3+
- 2.Sxb3#
- 1...Bd5
- 2.Re4#
- 2.Rxd5#
- 2.Re6#
- 1...Qe4
- 2.Se2#
- 2.Rxe4#
- 2.Rd5#
- 1...Qd5
- 2.Se2#
- 2.Re4#
- 2.Rxd5#
- 1...Qc2
- 2.Re6#
- 1...Rd5
- 2.Rd3#
- 2.Re4#
- 2.Rxd5#
- 1...Re6
- 2.Rd3#
- 2.Rb4#
- 2.Re4#
- 2.Rd5#
- 2.Rxe6#
- 1...Rg6
- 2.Re4#
- 2.Rd5#
- 1...Rd8
- 2.Re4#
- 2.Rd5#
- 2.Re8#
- 1...Be6
- 2.Rxe3#
- 2.Re4#
- 2.Ra5#
- 2.Rb5#
- 2.Rc5#
- 2.Rd5#
- 2.Rf5#
- 2.Rxg5#
- 2.Rxe6#
- 1...Sf3
- 2.Re4#
- 2.Rd5#
- 1...Sh3
- 2.Re4#
- 2.Rd5#
- 1...Se4
- 2.Rxe4#
- 2.Rd5#
- 1...Se6
- 2.Rd3#
- 2.Rb4#
- 2.Re4#
- 2.Rd5#
- 1...Sh7
- 2.Re4#
- 2.Rd5#
- 1...f3
- 2.Re4#
- 2.Rd5#
- 1...Rf6!
- threat
- 1.Rxe3?
- Keys
- 1.Rf5!
- threat
- 2.Qe5#
- 1...Qxb2+
- 2.Bxb2#
- 1...Bxb3+
- 2.Sxb3#
- 1...Bxe8
- 2.Rb4#
- 1...Qe4
- 2.Se2#
- 1...Qd5
- 2.Se2#
- 1...Rd5
- 2.Rd3#
- 1...Re6
- 2.Rb4#
- 1...Be6
- 2.Qh8#
- 1...Sf3
- 2.Qe4#
- 1...Se6
- 2.Rb4#
- 1...f3
- 2.Qxe3#
- threat
- 1.Rf5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 5
- REMOVED MATES = 9
- Sets
- Q(a);N_GUARD,N_PINP(D)::S(B)
- Q(a);CHECK,OGATE,XP(D)::B(E),XQ(a)
- Q(a);N_GUARD::S(B),XQ(a)
- R(h);N_PINR(F)::R1(F)
- B(k);CHECK,XR(F)::S(B),XB(k)
- B(k);N_PINR(F)::R(F)
- S(f);N_GUARD,S_CUTQ(a)::R1(G)
- S(j);N_GUARD::B(E)
- S(j);N_GUARD::B(E),XS(j)
- Tries
- Try
- R(G);XP(c)
- Threat
- DUALS(2)
- Vars
- B(k);CHECK,XR(F)::S(B),XB(k)
- B(k);N_PINR(F),XQ(I)::R1(F)
- P(e);OGATE,XR(G)::QAB1(I),XP(e)
- Q(a);N_PINP(D)::QAB1(I)
- Q(a);N_GUARD,N_PINP(D)::S(B)
- Q(a);::QAB1(I)
- R(h);N_PINR(F)::R1(F)
- B(k);::QAB1(I)
- B(k);S_CUTR(h)::QAB(I)
- B(k);N_PINR(F)::QAB1(I)
- S(f);::R1(G)
- S(f);N_PINR(F)::R1(F)
- S(j);::QAB1(I)
- P(e);::R1(G)
- Refutation
- Q(a);CHECK,XP(D)
- Try
- R(G);CHECK
- Vars
- Q(a);N_PINP(D),XR(G)::S(B)
- Refutation
- S(f);XR(G)
- Try
- R(G);CHECK,N_SPINR(F)
- Vars
- Q(a);N_PINP(D),P_PINR(F),XR(G)::S(B)
- R(h);XR(G)::R1(F)
- P(g);XR(G)::R1(F)
- Refutation
- B(k);P_PINR(F),XR(G)
- Try
- R(G);XS(f)
- Threat
- QAB1(I)
- Vars
- Q(a);CHECK,OGATE,XP(D)::B(E),XQ(a)
- B(k);CHECK,XR(F)::S(B),XB(k)
- B(k);N_PINR(F),XQ(I)::R(F)
- Q(a);N_GUARD,N_PINP(D)::S(B)
- R(h);N_PINR(F)::R1(F)
- R(h);N_PINR(F)::R(F)
- B(k);S_CUTR(h)::QAB(I)
- Refutation
- P(i);XR(G)
- Try
- Q(I);
- Threat
- DUALS(3)
- Vars
- Q(a);CHECK,OGATE,XP(D)::B(E),XQ(a)
- B(k);CHECK,XR(F)::S(B),XB(k)
- Q(a);::QAB(I)+R(G)
- Refutation
- R(h);
- Try
- Actual
- R(G);
- Threat
- QAB1(I)
- Vars
- Q(a);CHECK,OGATE,XP(D)::B(E),XQ(a)
- B(k);CHECK,XR(F)::S(B),XB(k)
- B(k);N_PINR(F),XQ(I)::R(F)
- Q(a);N_GUARD,N_PINP(D)::S(B)
- R(h);N_PINR(F)::R1(F)
- R(h);N_PINR(F)::R(F)
- B(k);S_CUTR(h)::QAB(I)
- S(f);N_GUARD,S_CUTQ(a)::QAR1(I)
- S(f);N_PINR(F)::R(F)
- P(e);N_GUARD::QAB1(I),XP(c)
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).