MESON Chess Problem Database
Problem Display
PID: 245728 (2BnR1K1/6P1/2r4B/3Npp1R/1N1Pk1p1/1b2P3/Q4rPb/8 w - - 0 1)
Wirtanen, Erkki Aukusti
Main-Post, 1971
(First published on Thu Jul 1 1971)
#2
12 + 9
| 15148 | Sadier Collection | 2021 |
SOLUTION
- SOUND
- Sets
- 1...Rxa2
- 2.Bxf5#
- 1...Rb2
- 2.Bxf5#
- 1...Rfc2
- 2.Bxf5#
- 1...Rd2
- 2.Bxf5#
- 1...Re2
- 2.Bxf5#
- 1...Rxg2
- 2.Qxg2#
- 1...Rf4
- 2.Rxe5#
- 1...Rc4
- 2.Sf6#
- 1...Re6
- 2.Sc3#
- 1...Bg1
- 2.Rxe5#
- 1...Bf4
- 2.Bxf5#
- 1...Bxd5+
- 2.Qxd5#
- 1...Se6
- 2.Sf6#
- 1...g3
- 2.Rxe5#
- 1...f4
- 2.Bf5#
- 2.Rhxe5#
- 2.Rexe5#
- 1...Rxa2
- Tries
- 1.Be6?
- threat
- 2.Sf6#
- 1...Rxg2
- 2.Qxg2#
- 1...Rxe6
- 2.Sc3#
- 1...Bxd5
- 2.Bxd5#
- 2.Qxd5#
- 1...exd4
- 2.Bxf5#
- 1...Bf4
- 2.Bxf5#
- 1...f4
- 2.Bf5#
- 2.Rxe5#
- 1...Rf4!
- threat
- 1.Rxh2?
- threat
- 2.Rxe5#
- 1...Bxd5+
- 2.Qxd5#
- 1...Rxg2
- 2.Qxg2#
- 1...Re6
- 2.Sc3#
- 1...Se6
- 2.Sf6#
- 1...Sf7!
- threat
- 1.Re6?
- threat
- 2.Sf6#
- 1...Rxg2
- 2.Qxg2#
- 1...Rxe6
- 2.Sc3#
- 1...Bxd5
- 2.Qxd5#
- 1...Rf4
- 2.Rxe5#
- 1...f4
- 2.Rhxe5#
- 2.Rexe5#
- 1...Bf4!
- threat
- 1.Qxb3?
- threat
- 2.Qd3#
- 1...Rd2
- 2.Bxf5#
- 1...Rc3
- 2.Sxc3#
- 2.Sf6#
- 1...Rxg2!
- threat
- 1.Be6?
- Keys
- 1.Bf4!
- threat
- 2.Bxf5#
- 2.Rxe5#
- 1...Bxd5+
- 2.Qxd5#
- 1...Rxg2
- 2.Qxg2#
- 1...Rxf4
- 2.Rxe5#
- 1...Rxc8
- 2.Rxe5#
- 1...Bxf4
- 2.Bxf5#
- 1...Re6
- 2.Sc3#
- 1...Rf6
- 2.Rxe5#
- 1...Se6
- 2.Sf6#
- 1...Sf7
- 2.Bxf5#
- threat
- 1.Bf4!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 8
- Sets
- R(a);N_GUARD,XQ(A)::B(J),XP(g)
- R(a);N_GUARD::B(J),XP(g)
- R(a);OGATE,XP(B)::QAB(A),XR(a)
- R(a);S_CUTB(b)::R1(K),XP(f)
- R(h);N_PINS(F)::S(F)
- R(h);N_PINS(F),N_SPINP(f)::S(F)
- B(b);N_GUARD::R1(K),XP(f)
- B(b);S_CUTR(a)::B(J),XP(g)
- B(c);CHECK,OGATE,XS(F)::QAB1(A),XB(c)
- S(i);N_PINS(F),N_SPINP(f)::S(F)
- P(e);S_CUTB(b)::R1(K),XP(f)
- Tries
- Try
- B(J);N_PINP(f),N_SPINS(F)
- Threat
- S(F)
- Vars
- R(a);OGATE,XP(B)::QAB(A),XR(a)
- R(h);N_GUARD,XB(J)::S(F)
- P(f);XP(E)::R(K)+B(J),DCHECK,XP(g)
- B(b);S_CUTR(a)::B(J),XP(g)
- Refutation
- R(a);
- Try
- R(G);XB(b)
- Threat
- R1(K),XP(f)
- Vars
- B(c);CHECK,OGATE,XS(F)::QAB1(A),XB(c)
- R(a);OGATE,XP(B)::QAB(A),XR(a)
- R(h);N_PINS(F),N_SPINP(f)::S(F)
- S(i);N_PINS(F),N_SPINP(f)::S(F)
- Refutation
- S(i);N_PINS(F)
- Try
- R(K);N_SPINS(F)
- Threat
- S(F)
- Vars
- R(a);OGATE,XP(B)::QAB(A),XR(a)
- R(h);N_GUARD,N_SPINP(f),XR(K)::S(F)
- B(c);OGATE,P_PINR(K),XS(F)::QAB1(A),XB(c)
- R(a);S_CUTB(b)::R1(K),XP(f)
- Refutation
- B(b);
- Try
- Q(A);N_SPINS(F),XB(c)
- Threat
- QAB1(A)
- Vars
- R(a);N_GUARD::B(J),XP(g)
- Refutation
- R(a);XP(B)
- Try
- Actual
- B(H);
- Threat
- DUALS(2)
- Vars
- B(c);CHECK,OGATE,XS(F)::QAB1(A),XB(c)
- R(a);OGATE,XP(B)::QAB(A),XR(a)
- R(a);XB(H)::R1(K),XP(f)
- R(h);XB(J)::R1(K),XP(f)
- B(b);XB(H)::B(J),XP(g)
- R(h);N_PINS(F),N_SPINP(f)::S(F)
- R(h);::R1(K),XP(f)
- S(i);N_PINS(F),N_SPINP(f)::S(F)
- S(i);N_PINS(F)::B(J),XP(g)
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).