MESON Chess Problem Database
Problem Display
PID: 90145 (8/1N2p3/K2nB3/2PrpP2/p3p1Q1/Pp1k1pN1/1B1P4/2RR4 w - - 0 1)
Usath, Walter
Die Schwalbe, 1928
#2
12 + 9
| 6490 | yacpdb | 2009 |
SOLUTION
- SOUND
- Sets
- 1...Rd4
- 2.Rc3#
- 1...Rxc5
- 2.Sxc5#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...Rd4
- Tries
- 1.Sa5?
- 1...Sxf5
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...Rxc5!
- 1...Sxf5
- 1.Sxd6?
- threat
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...e3
- 2.Rc3#
- 2.Qc4#
- 2.Qe4#
- 1...Rxd6+!
- threat
- 1.Sd8?
- 1...Sxf5
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sb7
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...Rxc5!
- 1...Sxf5
- 1.Ba1?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...b2!
- 1...Rxc5
- 1.Bxe5?
- threat
- 2.Rc3#
- 1...Rxc5
- 2.Sxc5#
- 1...Sb5
- 2.Qxe4#
- 1...Rxe5!
- threat
- 1.Bxd5?
- 1...Sxf5
- 2.Bc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Sxb7
- 2.Bc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Sc4
- 2.Bxc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Sb5
- 2.Bc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Sf7
- 2.Bc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Sc8
- 2.Bc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...Se8
- 2.Bc4#
- 2.Bxe4#
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...e6!
- 1...Sxf5
- 1.Bd7?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxf5
- 2.Bb5#
- 2.Qxe4#
- 1...Sxb7
- 2.Bb5#
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Bxb5#
- 2.Qxe4#
- 1...Sf7
- 2.Bb5#
- 2.Qxe4#
- 1...Sc8
- 2.Bb5#
- 2.Qxe4#
- 1...Se8
- 2.Bb5#
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...e6!
- 1...Rxc5
- 1.Bf7?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Sxf7
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...e6!
- 1...Rxc5
- 1.Bc8?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Sxc8
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...e6!
- 1...Rxc5
- 1.Bg8?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...e6!
- 1...Rxc5
- 1.Qxf3+?
- 1...e3
- 2.Qe2#
- 2.Qxd5#
- 2.Qxe3#
- 2.dxe3#
- 1...exf3!
- 1...e3
- 1.Qf4?
- threat
- 2.Qe3#
- 1...Sxf5
- 2.Qxe4#
- 1...Sc4
- 2.Qxe4#
- 1...e3
- 2.Rc3#
- 2.Qxe3#
- 2.dxe3#
- 1...exf4!
- threat
- 1.Qh4?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...e3
- 2.Rc3#
- 1...f2!
- 1...Rxc5
- 1.f6?
- 1...Rxc5
- 2.Sxc5#
- 1...Sxb7
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sc4
- 2.Qxe4#
- 1...Sb5
- 2.Qxe4#
- 1...Sf5
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...exf6!
- 1...Rxc5
- 1.Sa5?
- Keys
- 1.Rc4!
- 1...Kxc4
- 2.d3#
- 1...Rxc5
- 2.Sxc5#
- 1...Sxc4
- 2.Qxe4#
- 1...Sxf5
- 2.Qxe4#
- 1...Sxb7
- 2.Qxe4#
- 1...Rd4
- 2.Rc3#
- 1...Sb5
- 2.Qxe4#
- 1...Sf7
- 2.Qxe4#
- 1...Sc8
- 2.Qxe4#
- 1...Se8
- 2.Qxe4#
- 1...f2
- 2.Qe2#
- 1...e3
- 2.Rc3#
- 1...Kxc4
- 1.Rc4!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(f);SBLOCK::R1(A)
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD::QAB1(G),XP(e)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Tries
- Try
- S(L);
- Vars
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- R(f);XP(H)
- Try
- S(L);XS(h)
- Threat
- QAB1(G),XP(e)
- Vars
- R(f);SBLOCK::R1(A)
- Refutation
- R(f);CHECK,XS(L)
- Try
- S(L);
- Vars
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- R(f);XP(H)
- Try
- B(C);
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(a);
- Try
- B(C);XP(g)
- Threat
- R1(A)
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD::QAB1(G),XP(e)
- Refutation
- R(f);XB(C)
- Try
- B(K);XR(f)
- Vars
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(i);
- Try
- B(K);
- Vars
- R(f);XP(H)::S(L),XR(f)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(i);
- Try
- B(K);
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- S(h);N_GUARD,XB(K)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(i);
- Try
- B(K);
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- S(h);N_GUARD,XB(K)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(i);
- Try
- B(K);
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(i);
- Try
- Q(G);CHECK,XP(c)
- Refutation
- P(e);XQ(G)
- Try
- Q(G);
- Threat
- QAR1(G)
- Vars
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD::QAB1(G),XP(e)
- Refutation
- P(g);XQ(G)
- Try
- Q(G);
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(e);::R1(A)
- Refutation
- P(c);
- Try
- P(I);
- Vars
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
- Refutation
- P(i);XP(I)
- Try
- Actual
- R(A);
- Vars
- K(b);OGATE,P_SPINP(e),P_SPINR(f),S_FLIGHT,XR(A)::P(D)
- R(f);XP(H)::S(L),XR(f)
- S(h);N_GUARD,XR(A)::QAB1(G),XP(e)
- S(h);N_GUARD,XP(I)::QAB1(G),XP(e)
- S(h);N_GUARD,XS(L)::QAB1(G),XP(e)
- R(f);SBLOCK::R1(A)
- S(h);N_GUARD::QAB1(G),XP(e)
- P(c);OGATE::QAB1(G)
- P(e);::R1(A)
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).