MESON Chess Problem Database
Problem Display
PID: 20976 (2B5/5r2/3k1PR1/nP1N4/3Q4/3K2n1/3N4/8 w - - 0 1)
Schumer, Jacob
Vorwarts, 1914
#2
8 + 4
| 3360 | Simple Two-move Themes | 1924 |
| 5501 | Chess Cameos | 1936 |
| 3310 | 2345 Chess Problems | 1997 |
SOLUTION
- SOUND
- Sets
- 1...Rxf6
- 2.Rxf6#
- 1...Ra7
- 2.f7#
- 1...Rb7
- 2.f7#
- 1...Rc7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Se7#
- 2.f7#
- 1...Rd7
- 2.f7#
- 1...Re7
- 2.fxe7#
- 1...Rg7
- 2.fxg7#
- 1...Rh7
- 2.f7#
- 1...Rf8
- 2.f7#
- 1...Sf1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sf5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...Rxf6
- Tries
- 1.Bh3?
- 1...Rxf6
- 2.Rxf6#
- 1...Sh1
- 2.Se4#
- 1...Ra7
- 2.f7#
- 1...Rb7
- 2.f7#
- 1...Rc7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Se7#
- 2.f7#
- 1...Rd7
- 2.f7#
- 1...Re7
- 2.fxe7#
- 1...Rg7
- 2.fxg7#
- 1...Rh7
- 2.f7#
- 1...Rf8
- 2.f7#
- 1...Sf1
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sh5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...Sf5!
- 1...Rxf6
- 1.Bg4?
- 1...Rxf6
- 2.Rxf6#
- 1...Sh1
- 2.Se4#
- 1...Ra7
- 2.f7#
- 1...Rb7
- 2.f7#
- 1...Rc7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Se7#
- 2.f7#
- 1...Rd7
- 2.f7#
- 1...Re7
- 2.fxe7#
- 1...Rg7
- 2.fxg7#
- 1...Rh7
- 2.f7#
- 1...Rf8
- 2.f7#
- 1...Sf1
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sh5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...Sf5!
- 1...Rxf6
- 1.Bf5?
- 1...Rxf6
- 2.Rxf6#
- 1...Sh1
- 2.Se4#
- 1...Ra7
- 2.f7#
- 1...Rb7
- 2.f7#
- 1...Rc7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Se7#
- 2.f7#
- 1...Rd7
- 2.f7#
- 1...Re7
- 2.fxe7#
- 1...Rg7
- 2.fxg7#
- 1...Rh7
- 2.f7#
- 1...Rf8
- 2.f7#
- 1...Sf1
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sh5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...Sxf5!
- 1...Rxf6
- 1.Rg5?
- threat
- 2.Qb4#
- 1...Rc7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Se7#
- 1...Se4
- 2.Sxe4#
- 1...Sf5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 2.Qb6#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 2.Qb6#
- 1...Rd7!
- threat
- 1.Rh6?
- 1...Rxf6
- 2.Rxf6#
- 1...Rd7
- 2.f7#
- 1...Sh1
- 2.Se4#
- 1...Ra7
- 2.f7#
- 1...Rb7
- 2.f7#
- 1...Rc7
- 2.Sc3#
- 2.Se3#
- 2.Sb4#
- 2.Sf4#
- 2.Sb6#
- 2.Se7#
- 2.f7#
- 1...Re7
- 2.fxe7#
- 1...Rg7
- 2.fxg7#
- 1...Rf8
- 2.f7#
- 1...Sf1
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sf5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...Rh7!
- 1...Rxf6
- 1.Qc5+?
- 1...Ke5
- 2.Sf3#
- 1...Kxc5!
- 1...Ke5
- 1.Qb6+?
- 1...Kxd5
- 2.Qd4#
- 1...Ke5
- 2.Qe6#
- 1...Sc6!
- 1...Kxd5
- 1.Qb4+?
- 1...Kxd5
- 2.Qd4#
- 1...Ke5!
- 1...Kxd5
- 1.Qf4+?
- 1...Kxd5
- 2.Qd4#
- 1...Kc5!
- 1...Kxd5
- 1.Bh3?
- Keys
- 1.Kc2!
- 1...Rc7+
- 2.Sc3#
- 1...Rxf6
- 2.Rxf6#
- 1...Rd7
- 2.f7#
- 1...Ra7
- 2.f7#
- 1...Rb7
- 2.f7#
- 1...Re7
- 2.fxe7#
- 1...Rg7
- 2.fxg7#
- 1...Rh7
- 2.f7#
- 1...Rf8
- 2.f7#
- 1...Sf1
- 2.Se4#
- 1...Sh1
- 2.Se4#
- 1...Se2
- 2.Se4#
- 1...Se4
- 2.Sxe4#
- 1...Sf5
- 2.Se4#
- 1...Sh5
- 2.Se4#
- 1...Sb3
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sc6
- 2.Sc4#
- 1...Sb7
- 2.Sc4#
- 1...Rc7+
- 1.Kc2!
FEATURES
- Static
- TYPE = WAITER
- CHANGED MATES = 0
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- R(d);OGATE,P_SPINR(d),XP(F)::R(G),XR(d)
- R(d);OGATE::R(G)+P(F)
- R(d);OGATE::R(G)+P(F),XR(d)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Tries
- Try
- B(H);
- Vars
- R(d);OGATE,P_SPINR(d),XP(F)::R(G),XR(d)
- S(a);N_GUARD::S(A)
- R(d);OGATE::R(G)+P(F)
- R(d);OGATE::R(G)+P(F),XR(d)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- S(a);
- Try
- B(H);
- Vars
- R(d);OGATE,P_SPINR(d),XP(F)::R(G),XR(d)
- S(a);N_GUARD::S(A)
- R(d);OGATE::R(G)+P(F)
- R(d);OGATE::R(G)+P(F),XR(d)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- S(a);
- Try
- B(H);
- Vars
- R(d);OGATE,P_SPINR(d),XP(F)::R(G),XR(d)
- S(a);N_GUARD::S(A)
- R(d);OGATE::R(G)+P(F)
- R(d);OGATE::R(G)+P(F),XR(d)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- S(a);XB(H)
- Try
- R(G);
- Threat
- QAB(C)
- Vars
- S(a);N_GUARD::S(A),XS(a)
- S(a);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- S(b);N_GUARD::S(A)
- Refutation
- R(d);
- Try
- R(G);
- Vars
- R(d);OGATE,P_SPINR(d),XP(F)::R(G),XR(d)
- R(d);OGATE::R(G)+P(F)
- S(a);N_GUARD::S(A)
- R(d);OGATE::R(G)+P(F),XR(d)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
- Refutation
- R(d);
- Try
- Q(C);CHECK
- Vars
- K(c);S_FLIGHT::S(A)
- Refutation
- K(c);S_FLIGHT,XQ(C)
- Try
- Q(C);CHECK
- Vars
- K(c);OGATEB,P-FLIGHT,XS(E)::QAR1(C)
- K(c);OGATE,S_FLIGHT::QAR1(C)
- Refutation
- S(b);P_SPINS(b)
- Try
- Q(C);CHECK
- Vars
- K(c);OGATEB,P-FLIGHT,XS(E)::QAR1(C)
- Refutation
- K(c);S_FLIGHT
- Try
- Q(C);CHECK
- Vars
- K(c);OGATEB,P-FLIGHT,XS(E)::QAR1(C)
- Refutation
- K(c);S_FLIGHT
- Try
- Actual
- K(B);S_FLIGHT
- Vars
- R(d);CHECK,SBLOCK::QAR(C)+S(E)
- R(d);OGATE,P_SPINR(d),XP(F)::R(G),XR(d)
- R(d);OGATE::R(G)+P(F)
- R(d);OGATE::R(G)+P(F),XR(d)
- S(a);N_GUARD::S(A)
- S(a);N_GUARD::S(A),XS(a)
- S(b);N_GUARD::S(A)
- S(b);N_GUARD::S(A),XS(b)
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).