MESON Chess Problem Database
Problem Display
PID: 90273 (1N6/2pp4/pbRp4/k2P2p1/P2Q2R1/Pn2N3/n2p4/1K1B4 w - - 0 1)
Fraenkel, Febus Hirsch
Die Schwalbe, 1932
#2
10 + 10
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Bxd4
- 2.Rxa6#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 2.Qb4#
- 1...Sc3+
- 2.Qxc3#
- 1...Sb4
- 2.Qxb4#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sxd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...dxc6
- 2.Sxc6#
- 1...Bxd4
- Tries
- 1.Kxa2?
- threat
- 2.Qc3#
- 2.Qb4#
- 1...Bxd4
- 2.Rxa6#
- 1...Sxd4
- 2.Sc4#
- 1...Bc5
- 2.Rxa6#
- 1...Sc1+!
- threat
- 1.Kb2?
- 1...Sxd4
- 2.Sc4#
- 1...dxc6
- 2.Sxc6#
- 1...Sb4
- 2.Qxb4#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 2.Qb4#
- 1...Sc3
- 2.Qxc3#
- 2.Qb4#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Bxd4+!
- 1...Sxd4
- 1.Re4?
- 1...Sc3+
- 2.Qxc3#
- 1...Bxd4
- 2.Rxa6#
- 1...Sxd4
- 2.Sc4#
- 1...dxc6
- 2.Sxc6#
- 1...Sb4
- 2.Qxb4#
- 1...Sa1
- 2.Sc4#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 2.Qb4#
- 1...Sbc1
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...g4!
- 1...Sc3+
- 1.Rxg5?
- 1...Bxd4
- 2.Rxa6#
- 1...Sxd4
- 2.Sc4#
- 1...dxc6
- 2.Sxc6#
- 1...Sb4
- 2.Qxb4#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qb4#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sc3+!
- 1...Bxd4
- 1.Qb2?
- 1...Sc3+
- 2.Qxc3#
- 1...Bxe3
- 2.Rxa6#
- 1...dxc6
- 2.Sxc6#
- 1...Bd4
- 2.Rxa6#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sb4!
- 1...Sc3+
- 1.Qc3+?
- 1...Sb4
- 2.Qxb4#
- 1...Sxc3+!
- 1...Sb4
- 1.Qc5+?
- 1...Bxc5
- 2.Rxa6#
- 1...Sxc5
- 2.Sc4#
- 1...dxc5!
- 1...Bxc5
- 1.Qf6?
- 1...Sc3+
- 2.Qxc3#
- 1...Bxe3
- 2.Rxa6#
- 1...dxc6
- 2.Sxc6#
- 1...Bd4
- 2.Rxa6#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sb4!
- 1...Sc3+
- 1.Qg7?
- 1...Sc3+
- 2.Qxc3#
- 1...Bxe3
- 2.Rxa6#
- 1...dxc6
- 2.Sxc6#
- 1...Bd4
- 2.Rxa6#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sb4!
- 1...Sc3+
- 1.Qh8?
- 1...Sc3+
- 2.Qxc3#
- 1...Bxe3
- 2.Rxa6#
- 1...dxc6
- 2.Sxc6#
- 1...Bd4
- 2.Rxa6#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sb4!
- 1...Sc3+
- 1.Qxd2+?
- 1...Sc3+
- 2.Qxc3#
- 1...Sb4
- 2.Qxb4#
- 1...Sxd2+!
- 1...Sc3+
- 1.Qd3?
- threat
- 2.Qxa6#
- 1...Sc3+
- 2.Qxc3#
- 1...Sc5
- 2.Sc4#
- 1...Sb4!
- threat
- 1.Qc4?
- threat
- 2.Qxa6#
- 1...Sc3+
- 2.Qxc3#
- 1...Sb4
- 2.Qxb4#
- 1...Sc5!
- threat
- 1.Qe4?
- 1...Bxe3
- 2.Rxa6#
- 1...dxc6
- 2.Sxc6#
- 1...Bd4
- 2.Rxa6#
- 1...Sb4
- 2.Qxb4#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qb4#
- 1...Sa1
- 2.Sc4#
- 1...Sbc1
- 2.Sc4#
- 1...Sd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sc3+!
- 1...Bxe3
- 1.Kxa2?
- Keys
- 1.Qa1!
- 1...Sc3+
- 2.Qxc3#
- 1...Bxe3
- 2.Rxa6#
- 1...Sxa1
- 2.Sc4#
- 1...dxc6
- 2.Sxc6#
- 1...Bd4
- 2.Rxa6#
- 1...Sb4
- 2.axb4#
- 1...Bc5
- 2.Rxa6#
- 1...Ba7
- 2.Rxa6#
- 1...Sac1
- 2.Qc3#
- 1...Sbc1
- 2.Sc4#
- 1...Sd4
- 2.Sc4#
- 1...Sc5
- 2.Sc4#
- 1...Sc3+
- 1.Qa1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 2
- REMOVED MATES = 0
- Sets
- B(g);OGATE,XQ(F)::R1(I),XP(f)
- B(g);OGATE::R1(I),XP(f)
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- S(a);N_GUARD::QAB1(F),XS(a)
- S(c);::S(D)
- S(c);XQ(F)::S(D)
- P(j);XR(I)::S(J),XP(j)
- Tries
- Try
- K(A);S_FLIGHT,XS(a)
- Threat
- DUALS(2)
- Vars
- B(g);OGATE,XQ(F)::R1(I),XP(f)
- S(c);XQ(F)::S(D)
- B(g);OGATE::R1(I),XP(f)
- Refutation
- S(c);CHECK
- Try
- K(A);P-FLIGHT
- Vars
- S(c);XQ(F)::S(D)
- P(j);XR(I)::S(J),XP(j)
- S(a);N_GUARD::QAB1(F),XS(a)
- B(g);OGATE::R1(I),XP(f)
- S(c);::S(D)
- Refutation
- B(g);CHECK,XQ(F)
- Try
- R(G);
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- B(g);OGATE,XQ(F)::R1(I),XP(f)
- S(c);XQ(F)::S(D)
- P(j);XR(I)::S(J),XP(j)
- S(a);N_GUARD::QAB1(F),XS(a)
- S(c);::S(D)
- B(g);OGATE::R1(I),XP(f)
- Refutation
- P(e);
- Try
- R(G);XP(e)
- Vars
- B(g);OGATE,XQ(F)::R1(I),XP(f)
- S(c);XQ(F)::S(D)
- P(j);XR(I)::S(J),XP(j)
- S(a);N_GUARD::QAB1(F),XS(a)
- B(g);OGATE::R1(I),XP(f)
- S(a);N_GUARD::QAB1(F)
- S(c);::S(D)
- Refutation
- S(a);CHECK
- Try
- Q(F);
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- B(g);OGATE,XS(D)::R1(I),XP(f)
- P(j);XR(I)::S(J),XP(j)
- B(g);OGATE::R1(I),XP(f)
- S(a);N_GUARD::QAB(F)
- S(c);::S(D)
- Refutation
- S(a);
- Try
- Q(F);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a)::QAB1(F),XS(a)
- Refutation
- S(a);CHECK,XQ(F)
- Try
- Q(F);CHECK
- Vars
- B(g);OGATE,XQ(F)::R1(I),XP(f)
- S(c);XQ(F)::S(D)
- Refutation
- P(h);XQ(F)
- Try
- Q(F);
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- B(g);OGATE,XS(D)::R1(I),XP(f)
- P(j);XR(I)::S(J),XP(j)
- B(g);OGATE::R1(I),XP(f)
- S(a);N_GUARD::QAB(F)
- S(c);::S(D)
- Refutation
- S(a);
- Try
- Q(F);
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- B(g);OGATE,XS(D)::R1(I),XP(f)
- P(j);XR(I)::S(J),XP(j)
- B(g);OGATE::R1(I),XP(f)
- S(a);N_GUARD::QAB(F)
- S(c);::S(D)
- Refutation
- S(a);
- Try
- Q(F);
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- B(g);OGATE,XS(D)::R1(I),XP(f)
- P(j);XR(I)::S(J),XP(j)
- B(g);OGATE::R1(I),XP(f)
- S(a);N_GUARD::QAB(F)
- S(c);::S(D)
- Refutation
- S(a);
- Try
- Q(F);CHECK,XP(b)
- Vars
- S(a);CHECK,N_GUARD,P_SPINS(a)::QAB(F),XS(a)
- S(a);N_GUARD,P_SPINS(a)::QAB1(F),XS(a)
- Refutation
- S(c);CHECK,XQ(F)
- Try
- Q(F);
- Threat
- QAR1(F),XP(f)
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- S(c);::S(D)
- Refutation
- S(a);
- Try
- Q(F);
- Threat
- QAR1(F),XP(f)
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- S(a);N_GUARD::QAB1(F),XS(a)
- Refutation
- S(c);
- Try
- Q(F);
- Vars
- B(g);OGATE,XS(D)::R1(I),XP(f)
- P(j);XR(I)::S(J),XP(j)
- B(g);OGATE::R1(I),XP(f)
- S(a);N_GUARD::QAB1(F),XS(a)
- S(a);N_GUARD::QAB1(F)
- S(c);::S(D)
- Refutation
- S(a);CHECK
- Try
- Actual
- Q(F);
- Vars
- S(a);CHECK,N_GUARD::QAB(F),XS(a)
- B(g);OGATE,XS(D)::R1(I),XP(f)
- S(c);XQ(F)::S(D)
- P(j);XR(I)::S(J),XP(j)
- B(g);OGATE::R1(I),XP(f)
- S(a);OGATE::P(C),XS(a)
- S(a);N_GUARD::QAB(F)
- S(c);::S(D)
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).