MESON Chess Problem Database
Problem Display
PID: 253099 (bNBQ4/r1p1p2r/p2B4/3k2np/3N3R/1P2P3/n7/7K w - - 0 1)
Restad, Birger
Die Schwalbe, 1930
#2
9 + 10
SOLUTION
- SOUND
- Sets
- 1...Sf3
- 2.Be6#
- 1...Sh3
- 2.Be6#
- 1...Se4
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...Sf7
- 2.Be6#
- 1...cxd6
- 2.Qa5#
- 1...c5
- 2.Bc7#
- 1...exd6
- 2.Qxg5#
- 1...e5
- 2.Be7#
- 1...Sf3
- Tries
- 1.Sc2?
- threat
- 2.Rd4#
- 1...cxd6
- 2.Qa5#
- 1...exd6
- 2.Qxg5#
- 1...Sf3
- 2.e4#
- 1...Se6
- 2.e4#
- 1...c5
- 2.Bc7#
- 1...e5
- 2.Be7#
- 1...Se4!
- threat
- 1.Sdc6?
- threat
- 2.Ba3#
- 2.Bb4#
- 2.Bxe7#
- 2.Rd4#
- 1...Bxc6
- 2.Rd4#
- 1...cxd6
- 2.Qa5#
- 1...exd6
- 2.Qxg5#
- 1...Rh6
- 2.Sxe7#
- 2.Rd4#
- 1...Rh8
- 2.Sxe7#
- 2.Rd4#
- 1...Sb4
- 2.Sxb4#
- 2.Bxb4#
- 2.Bxe7#
- 2.Rd4#
- 1...Sf3
- 2.Ba3#
- 2.Bb4#
- 2.Bxe7#
- 2.e4#
- 1...Se6
- 2.e4#
- 1...Sf7
- 2.Sxe7#
- 2.Rd4#
- 2.e4#
- 1...e5
- 2.Be7#
- 1...e6
- 2.Be7#
- 2.Rd4#
- 1...Se4!
- threat
- 1.Se6?
- threat
- 2.Bh2#
- 2.Bg3#
- 2.Bxc7#
- 2.Rd4#
- 1...cxd6
- 2.Qa5#
- 1...exd6
- 2.Qxg5#
- 1...Se4
- 2.Sf4#
- 1...Rh8
- 2.Rd4#
- 1...Bc6
- 2.Rd4#
- 1...Sf3
- 2.Bh2#
- 2.Bg3#
- 2.Bxc7#
- 2.e4#
- 1...Sf7
- 2.Rd4#
- 2.e4#
- 1...c5
- 2.Bc7#
- 1...c6
- 2.Bc7#
- 2.Rd4#
- 1...Sxe6!
- threat
- 1.Sbc6?
- threat
- 2.Ba3#
- 2.Bb4#
- 2.Bxe7#
- 1...cxd6
- 2.Qa5#
- 1...exd6
- 2.Qxg5#
- 1...Se4
- 2.Be6#
- 1...Rh6
- 2.Sxe7#
- 1...Rh8
- 2.Sxe7#
- 1...Sb4
- 2.Sxb4#
- 2.Bxb4#
- 2.Bxe7#
- 1...Se6
- 2.Bxe6#
- 2.e4#
- 1...Sf7
- 2.Sxe7#
- 2.Be6#
- 2.e4#
- 1...e5
- 2.Be7#
- 1...e6
- 2.Be7#
- 1...Bxc6!
- threat
- 1.Bf4+?
- 1...Ke4
- 2.Bf5#
- 1...Kc5+!
- 1...Ke4
- 1.Bxa6?
- threat
- 2.Bc4#
- 1...cxd6
- 2.Qa5#
- 1...exd6
- 2.Qxg5#
- 1...Rxa6!
- threat
- 1.Qxc7?
- threat
- 2.Qc5#
- 1...exd6
- 2.Qa5#
- 1...Bc6
- 2.Qxc6#
- 1...Se4
- 2.Be6#
- 1...Se6
- 2.Bxe6#
- 1...Rxc7!
- threat
- 1.Qxe7?
- threat
- 2.Qe5#
- 1...cxd6
- 2.Qxg5#
- 1...Sf3
- 2.Be6#
- 2.Qe6#
- 1...Se6
- 2.Bxe6#
- 2.Qxe6#
- 1...Sf7
- 2.Be6#
- 2.Qe6#
- 1...Rxe7!
- threat
- 1.Sc2?
- Keys
- 1.Se2!
- threat
- 2.Rd4#
- 1...cxd6
- 2.Qa5#
- 1...exd6
- 2.Qxg5#
- 1...Sf3
- 2.e4#
- 1...Se4
- 2.Sf4#
- 1...Se6
- 2.e4#
- 1...c5
- 2.Bc7#
- 1...e5
- 2.Be7#
- threat
- 1.Se2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 3
- ADDED MATES = 0
- REMOVED MATES = 2
- Sets
- S(c);N_GUARD::B(H)
- S(c);N_GUARD::B(H),XS(c)
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(g);SBLOCK::QAR(I)+B(F)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- P(h);SBLOCK::QAR(I)+B(F)
- Tries
- Try
- S(D);
- Threat
- R1(E)
- Vars
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- S(c);N_GUARD::P(C)
- P(g);SBLOCK::QAR(I)+B(F)
- P(h);SBLOCK::QAR(I)+B(F)
- Refutation
- S(c);
- Try
- S(D);
- Threat
- DUALS(4)
- Vars
- B(j);XS(D)::R1(E)
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- S(c);N_GUARD::P(C)
- P(h);::QAR(I)+B(F)
- Refutation
- S(c);
- Try
- S(D);
- Threat
- DUALS(4)
- Vars
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- S(c);SBLOCK::S(D)
- R(i);::R1(E)
- B(j);::R1(E)
- P(g);::QAR(I)+B(F)
- Refutation
- S(c);XS(D)
- Try
- S(G);
- Threat
- DUALS(3)
- Vars
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- S(c);N_GUARD::B(H)
- R(i);N_GUARD::S(G),XP(h)
- P(h);::QAR(I)+B(F)
- Refutation
- B(j);XS(G)
- Try
- B(F);CHECK
- Vars
- K(b);N_GUARD,S_FLIGHT::B(H)
- Refutation
- K(b);CHECK,P-FLIGHT
- Try
- B(H);XP(e)
- Threat
- B(H)
- Vars
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- Refutation
- R(f);XB(H)
- Try
- Q(I);XP(g)
- Threat
- QAR1(I)
- Vars
- P(h);SBLOCK,XB(F)::QAR(I)
- B(j);N_GUARD::QAB1(I),XB(j)
- S(c);N_GUARD::B(H)
- S(c);N_GUARD::B(H),XS(c)
- Refutation
- R(f);XQ(I)
- Try
- Q(I);XP(h)
- Threat
- QAR1(I)
- Vars
- P(g);SBLOCK,XB(F)::QAR(I),XS(c)
- Refutation
- R(i);XQ(I)
- Try
- Actual
- S(D);
- Threat
- R1(E)
- Vars
- P(g);OGATE,P_SPINP(g),SBLOCK,XB(F)::QAR(I)
- P(h);OGATE,P_SPINP(h),SBLOCK,XB(F)::QAR(I),XS(c)
- S(c);N_GUARD::P(C)
- S(c);SBLOCK::S(D)
- P(g);SBLOCK::QAR(I)+B(F)
- P(h);SBLOCK::QAR(I)+B(F)
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).