MESON Chess Problem Database
Problem Display
PID: 205808 (3R4/1B2p2Q/3npNP1/5ppP/1pR5/1P2k1Bp/2P4P/4K1b1 w - - 0 1)
Dahl, Anton M
Lund, Axel
Schackvarlden, 1925
#2
12 + 9
| 6490 | yacpdb | 2020 |
SOLUTION
- SOUND
- Sets
- 1...Bf2+
- 2.Bxf2#
- 1...Bxh2
- 2.Bf2#
- 1...Sxc4
- 2.Rd3#
- 1...Se4
- 2.Rd3#
- 1...Sb5
- 2.Rd3#
- 1...Sxb7
- 2.Rd3#
- 1...Sf7
- 2.Rd3#
- 1...Sc8
- 2.Rd3#
- 1...Se8
- 2.Rd3#
- 1...f4
- 2.Sg4#
- 1...g4
- 2.Bf4#
- 1...Bf2+
- Tries
- 1.Bg2?
- 1...Bf2+
- 2.Bxf2#
- 1...Bxh2
- 2.Bf2#
- 1...Sxc4
- 2.Rd3#
- 1...exf6
- 2.Qa7#
- 1...f4
- 2.Sg4#
- 1...Se4
- 2.Rd3#
- 1...Sb5
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sf7
- 2.Rd3#
- 1...Sc8
- 2.Rd3#
- 1...Se8
- 2.Rd3#
- 1...g4
- 2.Bf4#
- 1...e5
- 2.Sd5#
- 1...hxg2!
- 1...Bf2+
- 1.Bc6?
- 1...Bf2+
- 2.Bxf2#
- 1...Bxh2
- 2.Bf2#
- 1...Sxc4
- 2.Rd3#
- 1...exf6
- 2.Qa7#
- 1...Se4
- 2.Rd3#
- 1...f4
- 2.Sg4#
- 1...Sb5
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sf7
- 2.Rd3#
- 1...Sc8
- 2.Rd3#
- 1...Se8
- 2.Rd3#
- 1...g4
- 2.Bf4#
- 1...e5!
- 1...Bf2+
- 1.Ba8?
- 1...Bf2+
- 2.Bxf2#
- 1...Bxh2
- 2.Bf2#
- 1...Sxc4
- 2.Rd3#
- 1...exf6
- 2.Qa7#
- 1...Se4
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sb5
- 2.Rd3#
- 1...Sf7
- 2.Rd3#
- 1...Sc8
- 2.Rd3#
- 1...Se8
- 2.Rd3#
- 1...f4
- 2.Sg4#
- 1...g4
- 2.Bf4#
- 1...e5!
- 1...Bf2+
- 1.Rd4?
- threat
- 2.Rd3#
- 1...Bf2+
- 2.Bxf2#
- 1...Kxd4!
- threat
- 1.Rxd6?
- threat
- 2.Rd3#
- 2.Rxe6#
- 1...Bf2+
- 2.Bxf2#
- 1...e5
- 2.Rd3#
- 1...exd6!
- threat
- 1.Qxe7?
- 1...Bf2+
- 2.Bxf2#
- 1...Bxh2
- 2.Bf2#
- 1...Sxc4
- 2.Rd3#
- 2.Qc5#
- 1...Sxb7
- 2.Rd3#
- 1...Se4
- 2.Rd3#
- 1...Sb5
- 2.Rd3#
- 2.Qxe6#
- 1...Sf7
- 2.Rd3#
- 2.Qc5#
- 1...Sc8
- 2.Rd3#
- 2.Qc5#
- 2.Qxe6#
- 1...Se8
- 2.Rd3#
- 2.Qc5#
- 2.Qxe6#
- 1...f4
- 2.Sg4#
- 1...g4
- 2.Bf4#
- 1...e5!
- 1...Bf2+
- 1.Bg2?
- Keys
- 1.Bh1!
- 1...Bf2+
- 2.Bxf2#
- 1...Bxh2
- 2.Bf2#
- 1...Sxc4
- 2.Rd3#
- 1...exf6
- 2.Qa7#
- 1...f4
- 2.Sg4#
- 1...Se4
- 2.Rd3#
- 1...Sb5
- 2.Rd3#
- 1...Sb7
- 2.Rd3#
- 1...Sf7
- 2.Rd3#
- 1...Sc8
- 2.Rd3#
- 1...Se8
- 2.Rd3#
- 1...g4
- 2.Bf4#
- 1...e5
- 2.Sd5#
- 1...Bf2+
- 1.Bh1!
FEATURES
- Static
- TYPE = INCOMPLETE_BLOCK
- CHANGED MATES = 0
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(a);CHECK,N_GUARD::B(E),XB(a)
- B(a);N_GUARD,XP(C)::B(E)
- S(g);OGATE,XR(F)::R1(L)
- S(g);OGATE::R1(L)
- S(g);OGATE,XB(J)::R1(L)
- P(e);N_GUARD::S(H)
- P(f);N_GUARD::B(E)
- Tries
- Try
- B(J);
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- B(a);N_GUARD,XP(C)::B(E)
- S(g);OGATE,XR(F)::R1(L)
- P(i);OGATE,XS(H)::QAB(K)
- P(e);N_GUARD::S(H)
- S(g);OGATE::R1(L)
- P(f);N_GUARD::B(E)
- P(h);N_GUARD::S(H)
- Refutation
- P(c);XB(J)
- Try
- B(J);
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- B(a);N_GUARD,XP(C)::B(E)
- S(g);OGATE,XR(F)::R1(L)
- P(i);OGATE,XS(H)::QAB(K)
- S(g);OGATE::R1(L)
- P(e);N_GUARD::S(H)
- P(f);N_GUARD::B(E)
- Refutation
- P(h);
- Try
- B(J);
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- B(a);N_GUARD,XP(C)::B(E)
- S(g);OGATE,XR(F)::R1(L)
- P(i);OGATE,XS(H)::QAB(K)
- S(g);OGATE::R1(L)
- P(e);N_GUARD::S(H)
- P(f);N_GUARD::B(E)
- Refutation
- P(h);
- Try
- R(F);
- Threat
- R1(F)
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- Refutation
- K(b);P_SPINS(g),S_FLIGHT,XR(F)
- Try
- R(L);XS(g)
- Threat
- DUALS(2)
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- P(h);::R1(L)
- Refutation
- P(i);XR(L)
- Try
- Q(K);P_PINP(h),XP(i)
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- B(a);N_GUARD,XP(C)::B(E)
- S(g);OGATE,XB(J)::R1(L)
- S(g);N_SPINP(h),OGATE::R1(L)
- P(e);N_GUARD::S(H)
- P(f);N_GUARD::B(E)
- Refutation
- P(h);
- Try
- Actual
- B(J);
- Vars
- B(a);CHECK,N_GUARD::B(E),XB(a)
- B(a);N_GUARD,XP(C)::B(E)
- S(g);OGATE,XR(F)::R1(L)
- P(i);OGATE,XS(H)::QAB(K)
- P(e);N_GUARD::S(H)
- S(g);OGATE::R1(L)
- P(f);N_GUARD::B(E)
- P(h);N_GUARD::S(H)
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).