MESON Chess Problem Database
Problem Display
PID: 141749 (1q2N2b/1B1R4/1N6/2PRB2r/r3k1P1/p1pnpnP1/b6Q/K7 w - - 0 1)
Wirtanen, Erkki Aukusti
Probleemblad, 1977
#2
11 + 11
SOLUTION
- SOUND
- Sets
- 1...Qxe5
- 2.Rd4#
- 1...Qd6
- 2.Sxd6#
- 1...Qa7
- 2.Sd6#
- 1...Qxb7
- 2.Sd6#
- 1...Qa8
- 2.Sd6#
- 1...Qc8
- 2.Sd6#
- 1...Qd8
- 2.Sd6#
- 1...Rxe5
- 2.Rd4#
- 1...Rh7
- 2.Qxh7#
- 1...Bxe5
- 2.Rd4#
- 1...Bf6
- 2.Sxf6#
- 1...Sdxe5
- 2.Rd4#
- 1...Sfxe5
- 2.Rd4#
- 1...e2
- 2.Qxe2#
- 1...Qxe5
- Tries
- 1.Bf6?
- threat
- 2.Rd4#
- 2.Re5#
- 1...Qxg3
- 2.Rd4#
- 1...Qxb7
- 2.Sd6#
- 1...Rxd5
- 2.Qh7#
- 1...Bxf6
- 2.Sxf6#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Sfe5
- 2.Rd4#
- 2.Rxe5#
- 1...e2
- 2.Re5#
- 2.Qxe2#
- 1...Qe5
- 2.Rd4#
- 2.Rxe5#
- 1...Qd6
- 2.Sxd6#
- 2.Rd4#
- 1...Rd4
- 2.Rxd4#
- 2.Re5#
- 1...Re5
- 2.Rd4#
- 2.Rxe5#
- 1...Sde5
- 2.Rd4#
- 2.Rxe5#
- 1...Bxd5!
- threat
- 1.Bxh8?
- threat
- 2.Sf6#
- 2.Rd4#
- 2.Re5#
- 1...Qxg3
- 2.Rd4#
- 1...Qxb7
- 2.Sd6#
- 2.Sf6#
- 1...Qxe8
- 2.Rd4#
- 2.Re5#
- 1...Rxd5
- 2.Qh7#
- 1...Rxh8
- 2.Sf6#
- 1...Sxh2
- 2.Rd4#
- 2.Re5#
- 1...Sfe1
- 2.Rd4#
- 2.Re5#
- 1...Sg1
- 2.Rd4#
- 2.Re5#
- 1...Sd2
- 2.Rd4#
- 2.Re5#
- 1...Sd4
- 2.Rxd4#
- 2.Re5#
- 1...Sh4
- 2.Rd4#
- 2.Re5#
- 1...Sfe5
- 2.Rd4#
- 2.Rxe5#
- 1...Sg5
- 2.Rd4#
- 2.Re5#
- 1...e2
- 2.Re5#
- 2.Qxe2#
- 1...Qf4
- 2.Rd4#
- 2.Re5#
- 1...Qe5
- 2.Rd4#
- 2.Rxe5#
- 1...Qd6
- 2.Sxd6#
- 2.Rd4#
- 1...Qd8
- 2.Sd6#
- 2.Rd4#
- 2.Re5#
- 1...Rd4
- 2.Sf6#
- 2.Rxd4#
- 2.Re5#
- 1...Re5
- 2.Sf6#
- 2.Rd4#
- 2.Rxe5#
- 1...Rf5
- 2.Rd4#
- 2.Re5#
- 1...Rh6
- 2.Rd4#
- 2.Re5#
- 1...Sde5
- 2.Sf6#
- 2.Rd4#
- 2.Rxe5#
- 1...Bxd5!
- threat
- 1.Bf6?
- Keys
- 1.Re7!
- threat
- 2.Rd4#
- 1...Qxe5
- 2.Sd6#
- 1...Qxb7
- 2.Sd6#
- 1...Rxe5
- 2.Qh7#
- 1...Bxd5
- 2.Bxd5#
- 1...Bxe5
- 2.Sf6#
- 1...Sdxe5
- 2.Qc2#
- 1...Sfxe5
- 2.Qg2#
- 1...Sd4
- 2.Rxd4#
- 1...e2
- 2.Qxe2#
- 1...Rd4
- 2.Rxd4#
- threat
- 1.Re7!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 5
- ADDED MATES = 3
- REMOVED MATES = 7
- Sets
- Q(j);SBLOCK,XB(G)::B(I)+R(F),DCHECK
- Q(j);N_GUARD::S(K),XQ(j)
- Q(j);N_GUARD::S(K)
- Q(j);N_GUARD,XB(I)::S(K)
- R(i);SBLOCK,XB(G)::B(I)+R(F),DCHECK
- R(i);OGATE::QAB(B),XR(i)
- B(k);SBLOCK,XB(G)::B(I)+R(F),DCHECK
- B(k);N_GUARD::S(K),XB(k)
- S(d);SBLOCK,XB(G)::B(I)+R(F),DCHECK
- S(f);SBLOCK,XB(G)::B(I)+R(F),DCHECK
- P(e);OGATEB::QAR2(B),XP(e)
- Tries
- Try
- B(G);
- Threat
- DUALS(2)
- Vars
- Q(j);XP(C)::B(I)+R(F),DCHECK
- Q(j);N_GUARD,XB(I)::S(K)
- R(i);OGATE,P_SPINR(i),XR(F)::QAB(B)
- B(k);XB(G)::S(K),XB(k)
- Refutation
- B(a);P_SPINB(a),XR(F)
- Try
- B(G);XB(k)
- Threat
- DUALS(3)
- Vars
- Q(j);XP(C)::B(I)+R(F),DCHECK
- R(i);OGATE,P_SPINR(i),XR(F)::QAB(B)
- R(i);XB(G)::S(K)
- Refutation
- B(a);P_SPINB(a),XR(F)
- Try
- Actual
- R(J);
- Threat
- B(I)+R(F),DCHECK
- Vars
- Q(j);N_GUARD,P_SPINQ(j),XB(G)::S(K)
- Q(j);N_GUARD,XB(I)::S(K)
- R(i);OGATE,P_SPINR(i),XB(G)::QAB(B)
- B(a);OGATE,P_SPINB(a),XR(F)::B(I),XB(a)
- B(k);N_GUARD,P_SPINB(k),XB(G)::S(K)
- S(d);OGATEB,P_SPINS(d),XB(G)::QAB(B)
- S(f);OGATEB,P_SPINS(f),XB(G)::QAB(B)
- S(f);::B(I)+R(F),DCHECK,XS(f)
- P(e);OGATEB::QAR2(B),XP(e)
- R(g);::B(I)+R(F),DCHECK,XR(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).