MESON Chess Problem Database
Problem Display
PID: 90019 (B6B/3b1qn1/1Q6/p1n1r1Rp/1b1k4/N4p2/pPPNR3/K7 w - - 0 1)
von Pittler, Wolfgang
Die Schwalbe, 1930
#2
10 + 11
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Qb3
- 2.Sxb3#
- 1...Qc4
- 2.Sxf3#
- 1...Qe6
- 2.Sxf3#
- 1...Qg6
- 2.Sb3#
- 2.Sxf3#
- 1...Qe8
- 2.Sb3#
- 2.Sxf3#
- 1...Qg8
- 2.Sxf3#
- 1...Qf4
- 2.Sb3#
- 1...Qf5
- 2.Sb3#
- 1...Qf6
- 2.Sb3#
- 1...Qe7
- 2.Sb3#
- 2.Sxf3#
- 1...Qf8
- 2.Sb3#
- 1...Re4
- 2.Rxe4#
- 1...Rd5
- 2.Sb3#
- 2.Re4#
- 1...Rf5
- 2.Re4#
- 1...Rxg5
- 2.Re4#
- 1...Re6
- 2.Sb3#
- 2.Rd5#
- 1...Bh3
- 2.Sb5#
- 1...Bg4
- 2.Sb5#
- 1...Bb5
- 2.Sxb5#
- 1...Bf5
- 2.Sxf3#
- 2.Sb5#
- 1...Be6
- 2.Sb5#
- 1...Bc8
- 2.Sb5#
- 1...Sf5
- 2.Sxf3#
- 2.Bxe5#
- 2.Re4#
- 1...Se6
- 2.Sb3#
- 2.Bxe5#
- 2.Re4#
- 2.Qd6#
- 1...Se8
- 2.Bxe5#
- 2.Re4#
- 1...Qb3
- Tries
- 1.Rg4+?
- 1...Qf4
- 2.Sb3#
- 2.Sxf3#
- 1...Re4
- 2.Rexe4#
- 2.Rgxe4#
- 1...Bxg4
- 2.Sb5#
- 1...hxg4!
- 1...Qf4
- 1.Rgxe5?
- threat
- 2.R2e4#
- 2.R5e4#
- 1...fxe2
- 2.Re4#
- 1...Qd5
- 2.Rxd5#
- 1...Qe6
- 2.Sxf3#
- 2.R2e4#
- 1...Qg6
- 2.Sb3#
- 2.Sxf3#
- 2.Rd5#
- 1...Qe8
- 2.Sb3#
- 2.Sxf3#
- 2.R2e4#
- 2.Rd5#
- 2.Qd6#
- 1...Qf4
- 2.Sb3#
- 2.Rd5#
- 2.Qd6#
- 1...Qf5
- 2.Sb3#
- 2.Qd6#
- 1...Qe7
- 2.Sb3#
- 2.Sxf3#
- 2.R2e4#
- 2.Rd5#
- 1...Bf5
- 2.Sxf3#
- 2.Sb5#
- 1...Bc6!
- threat
- 1.Qxb4+?
- 1...Qc4
- 2.Sxf3#
- 2.Qxc4#
- 1...axb4!
- 1...Qc4
- 1.Qd6+?
- 1...Qd5
- 2.Sxf3#
- 1...Rd5!
- 1...Qd5
- 1.Rg4+?
- Keys
- 1.Qe6!
- threat
- 2.Qxe5#
- 1...Sb3+
- 2.Sxb3#
- 1...Qxe6
- 2.Sxf3#
- 1...Rxe2
- 2.Rd5#
- 1...Rxg5
- 2.Qe3#
- 1...Rxe6
- 2.Rd5#
- 1...Bxe6
- 2.Sb5#
- 1...Scxe6
- 2.Sb3#
- 1...Sgxe6
- 2.Bxe5#
- 1...Sd3
- 2.Sb3#
- 1...Qe8
- 2.Sxf3#
- 2.Qc4#
- 1...Qf4
- 2.Qc4#
- 1...Qf5
- 2.Qc4#
- 1...Qf6
- 2.Qc4#
- 1...Qe7
- 2.Sxf3#
- 2.Qc4#
- 1...Re3
- 2.Rd5#
- 2.Qxe3#
- 1...Re4
- 2.Rd5#
- 1...Rd5
- 2.Rxd5#
- 2.Qe3#
- 1...Rf5
- 2.Qe3#
- threat
- 1.Qe6!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 6
- ADDED MATES = 6
- REMOVED MATES = 8
- Sets
- Q(j);N_GUARD::S(D),XQ(j)
- Q(j);N_GUARD::S(D),XP(b)
- Q(j);N_GUARD::S(D)
- R(g);N_GUARD::R1(E),XR(g)
- R(g);N_GUARD::R1(E)
- R(g);N_GUARD,XR(G)::R1(E)
- B(i);N_GUARD::S(F)
- B(i);N_GUARD::S(F),XB(i)
- Tries
- Try
- R(G);CHECK
- Vars
- B(i);XR(G)::S(F)
- Refutation
- P(h);XR(G)
- Try
- R(G);XR(g)
- Threat
- DUALS(2)
- Vars
- P(b);XR(E)::R1(G)
- Q(j);N_GUARD::R1(G),XQ(j)
- Refutation
- B(i);
- Try
- Q(H);CHECK,N_PINS(f),XB(c)
- Refutation
- P(e);XQ(H)
- Try
- Q(H);CHECK,N_PINS(f)
- Vars
- Q(j);P_SPINQ(j)::S(D),XP(b)
- Refutation
- R(g);P_SPINR(g),P_SPINS(k)
- Try
- Actual
- Q(H);N_PINS(f)
- Threat
- QAB1(H),XR(g)
- Vars
- S(f);CHECK,N_GUARD::S(D),XS(f)
- Q(j);N_GUARD,XQ(H)::S(D),XP(b)
- R(g);OGATE,P_SPINS(k),XR(E)::R1(G)
- R(g);OGATE,P_SPINS(k),XR(G)::QAB1(H)
- R(g);OGATE,P_SPINS(k),XQ(H)::R1(G)
- B(i);N_GUARD,XQ(H)::S(F)
- S(f);N_GUARD,XQ(H)::S(D)
- S(k);OGATE,P_SPINR(g),XQ(H)::B(J),XR(g)
- S(f);N_GUARD::S(D)
- Q(j);N_GUARD::QAR1(H)
- R(g);OGATE,P_SPINS(k)::R1(G)
- R(g);OGATE,P_SPINS(k)::QAB1(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).