MESON Chess Problem Database
Problem Display
PID: 90087 (1nRR3B/1N1n4/r1b3QK/r3PP2/1N1k2B1/3P4/3P4/8 w - - 0 1)
Schirdewan, Ulrich
Die Schwalbe, 1949
#2
12 + 6
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Ra1
- 2.e6#
- 1...Ra2
- 2.e6#
- 1...Ra3
- 2.e6#
- 1...Ra4
- 2.e6#
- 1...Bh1
- 2.Rc4#
- 1...Bg2
- 2.Rc4#
- 1...Bf3
- 2.Rc4#
- 1...Ba4
- 2.Rc4#
- 1...Be4
- 2.Rc4#
- 1...Bb5
- 2.e6#
- 1...Bxb7
- 2.Rc4#
- 1...Ra1
- Tries
- 1.Sc2+?
- 1...Kd5
- 2.Bf3#
- 2.Qf7#
- 2.Qd6#
- 2.Qe6#
- 2.Qg8#
- 1...Kxd3!
- 1...Kd5
- 1.Bd1?
- threat
- 2.Qg1#
- 1...Bxb7
- 2.Rc4#
- 1...Bh1
- 2.Rc4#
- 1...Bg2
- 2.Rc4#
- 1...Bf3
- 2.Rc4#
- 1...Ba4
- 2.Rc4#
- 1...Be4
- 2.Rc4#
- 1...Bb5
- 2.e6#
- 1...Bd5!
- threat
- 1.Bf3?
- threat
- 2.Qg1#
- 1...Bxf3
- 2.Rc4#
- 1...Bxb7
- 2.Rc4#
- 1...Ra1
- 2.e6#
- 1...Ba4
- 2.Rc4#
- 1...Be4
- 2.Rc4#
- 1...Bb5
- 2.e6#
- 1...Bd5!
- threat
- 1.Bh3?
- threat
- 2.Qg1#
- 1...Bxb7
- 2.Rc4#
- 1...Ra1
- 2.e6#
- 1...Bh1
- 2.Rc4#
- 1...Bg2
- 2.Rc4#
- 1...Bf3
- 2.Rc4#
- 1...Ba4
- 2.Rc4#
- 1...Be4
- 2.Rc4#
- 1...Bb5
- 2.e6#
- 1...Bd5!
- threat
- 1.Bh5?
- threat
- 2.Qg1#
- 1...Bxb7
- 2.Rc4#
- 1...Ra1
- 2.e6#
- 1...Bh1
- 2.Rc4#
- 1...Bg2
- 2.Rc4#
- 1...Bf3
- 2.Rc4#
- 1...Ba4
- 2.Rc4#
- 1...Be4
- 2.Rc4#
- 1...Bb5
- 2.e6#
- 1...Bd5!
- threat
- 1.Rxd7+?
- 1...Rd5
- 2.e6#
- 1...Bd5
- 2.Rc4#
- 2.e6#
- 1...Bxd7
- 2.Rc4#
- 1...Sxd7!
- 1...Rd5
- 1.Qd6+?
- 1...Bd5
- 2.Rc4#
- 1...Rd5!
- 1...Bd5
- 1.Sc2+?
- Keys
- 1.Be2!
- threat
- 2.Qg1#
- 1...Bxb7
- 2.Rc4#
- 1...Ra1
- 2.e6#
- 1...Bh1
- 2.Rc4#
- 1...Bg2
- 2.Rc4#
- 1...Bf3
- 2.Rc4#
- 1...Ba4
- 2.Rc4#
- 1...Be4
- 2.Rc4#
- 1...Bb5
- 2.e6#
- 1...Bd5
- 2.Sc2#
- threat
- 1.Be2!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 3
- Sets
- R(b);N_GUARD::B(L)+P(E)
- B(d);OGATE,P_PINQ(G)::R1(J)
- B(d);P_PINQ(G),S_CUTR(b)::B(L)+P(E)
- B(d);OGATE,P_PINQ(G),XS(I)::R1(J)
- Tries
- Try
- S(C);CHECK
- Refutation
- K(a);P-FLIGHT,XP(B)
- Try
- B(D);
- Threat
- QAB(G)
- Vars
- B(d);OGATE,P_PINQ(G),XS(I)::R1(J)
- B(d);OGATE,P_PINQ(G)::R1(J)
- B(d);P_PINQ(G),S_CUTR(b)::B(L)+P(E)
- Refutation
- B(d);N_SPINS(e),P_PINQ(G)
- Try
- B(D);
- Threat
- QAB(G)
- Vars
- B(d);OGATE,P_PINQ(G),XB(D)::R1(J)
- B(d);OGATE,P_PINQ(G),XS(I)::R1(J)
- R(b);N_GUARD::B(L)+P(E)
- B(d);OGATE,P_PINQ(G)::R1(J)
- B(d);P_PINQ(G),S_CUTR(b)::B(L)+P(E)
- Refutation
- B(d);N_SPINS(e),P_PINQ(G)
- Try
- B(D);
- Threat
- QAB(G)
- Vars
- B(d);OGATE,P_PINQ(G),XS(I)::R1(J)
- R(b);N_GUARD::B(L)+P(E)
- B(d);OGATE,P_PINQ(G)::R1(J)
- B(d);P_PINQ(G),S_CUTR(b)::B(L)+P(E)
- Refutation
- B(d);N_SPINS(e),P_PINQ(G)
- Try
- B(D);
- Threat
- QAB(G)
- Vars
- B(d);OGATE,P_PINQ(G),XS(I)::R1(J)
- R(b);N_GUARD::B(L)+P(E)
- B(d);OGATE,P_PINQ(G)::R1(J)
- B(d);P_PINQ(G),S_CUTR(b)::B(L)+P(E)
- Refutation
- B(d);N_SPINS(e),P_PINQ(G)
- Try
- R(K);CHECK,XS(e)
- Vars
- R(b);P_SPINR(b)::B(L)+P(E)
- B(d);OGATE,P_PINQ(G),XR(K)::R1(J)
- Refutation
- S(f);XR(K)
- Try
- Q(G);CHECK,N_PINS(e)
- Vars
- B(d);OGATE,P_PINQ(G),P_SPINB(d)::R1(J)
- Refutation
- R(b);P_SPINR(b)
- Try
- Actual
- B(D);
- Threat
- QAB(G)
- Vars
- B(d);OGATE,P_PINQ(G),XS(I)::R1(J)
- R(b);N_GUARD::B(L)+P(E)
- B(d);OGATE,P_PINQ(G)::R1(J)
- B(d);P_PINQ(G),S_CUTR(b)::B(L)+P(E)
- B(d);N_SPINS(e),P_PINQ(G),SBLOCK::S(C)
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).