MESON Chess Problem Database
Problem Display
PID: 287500 (3r4/1pB3p1/pN1rP1Kb/R2PkpnR/4p1p1/1N1pQ3/1n1P1P2/8 w - - 0 1)
Popp, Willy
Die Schwalbe, 1935
#2
11 + 13
SOLUTION
- SOUND
- Sets
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf3
- 2.Rxf5#
- 1...Sh3
- 2.Rxf5#
- 1...Sxe6
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sh7
- 2.Rxf5#
- 1...g3
- 2.f4#
- 1...f4
- 2.Qd4#
- 1...Rd7
- Tries
- 1.Sa1?
- 1...Sxe6
- 2.Rxf5#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf3
- 2.Rxf5#
- 1...Sh3
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sh7
- 2.Rxf5#
- 1...g3
- 2.f4#
- 1...f4!
- 1...Sxe6
- 1.Sc1?
- 1...Sxe6
- 2.Rxf5#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sd1
- 2.Sxd3#
- 2.Sc4#
- 1...Sa4
- 2.Sxd3#
- 2.Sc4#
- 1...Sc4
- 2.Sxd3#
- 2.Sxc4#
- 1...Sf3
- 2.Rxf5#
- 1...Sh3
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sh7
- 2.Rxf5#
- 1...g3
- 2.f4#
- 1...f4!
- 1...Sxe6
- 1.Sd4?
- 1...Sxe6
- 2.Rxf5#
- 2.dxe6#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf3
- 2.Rxf5#
- 1...Sh3
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sh7
- 2.Rxf5#
- 1...g3
- 2.f4#
- 1...f4!
- 1...Sxe6
- 1.Bb8?
- 1...Sxe6
- 2.Rxf5#
- 1...f4
- 2.Qd4#
- 1...Rd7
- 2.Sxd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf3
- 2.Rxf5#
- 1...Sh3
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sh7
- 2.Rxf5#
- 1...g3
- 2.f4#
- 1...Rxb8!
- 1...Sxe6
- 1.Rc5?
- 1...Sxe6
- 2.Rxf5#
- 1...Rd7
- 2.Sxd7#
- 1...Ra8
- 2.Sd7#
- 1...Rb8
- 2.Sd7#
- 1...Rc8
- 2.Sd7#
- 1...Re8
- 2.Sd7#
- 1...Rf8
- 2.Sd7#
- 1...Rg8
- 2.Sd7#
- 1...Rh8
- 2.Sd7#
- 1...Sd1
- 2.Sc4#
- 1...Sa4
- 2.Sc4#
- 1...Sc4
- 2.Sxc4#
- 1...Sf3
- 2.Rxf5#
- 1...Sh3
- 2.Rxf5#
- 1...Sf7
- 2.Rxf5#
- 1...Sh7
- 2.Rxf5#
- 1...g3
- 2.f4#
- 1...f4
- 2.Qd4#
- 1...a5!
- 1...Sxe6
- 1.Rxg5?
- threat
- 2.Rxf5#
- 2.Qg3#
- 1...Rf8
- 2.Sd7#
- 2.Qg3#
- 1...g3
- 2.Rxf5#
- 2.Qxg3#
- 2.f4#
- 1...Bxg5!
- threat
- 1.Qxg5?
- threat
- 2.Qxf5#
- 1...Rf8
- 2.Sd7#
- 1...Bxg5!
- threat
- 1.f3?
- threat
- 2.f4#
- 1...Sxf3
- 2.Rxf5#
- 1...Sxe6
- 2.Rxf5#
- 2.Qxe4#
- 1...Sh3
- 2.Rxf5#
- 2.Qxe4#
- 1...Sf7
- 2.Rxf5#
- 2.Qxe4#
- 1...Sh7
- 2.Rxf5#
- 2.Qxe4#
- 1...f4
- 2.Qd4#
- 2.Qxe4#
- 1...gxf3!
- threat
- 1.Sa1?
- Keys
- 1.Sc5!
- 1...Sxe6
- 2.Rxf5#
- 2.Qxe4#
- 1...f4
- 2.Qxe4#
- 1...Rd7
- 2.Scxd7#
- 1...Ra8
- 2.Scd7#
- 1...Rb8
- 2.Scd7#
- 1...Rc8
- 2.Scd7#
- 1...Re8
- 2.Scd7#
- 1...Rf8
- 2.Scd7#
- 1...Rg8
- 2.Scd7#
- 1...Rh8
- 2.Scd7#
- 1...Sd1
- 2.Sxd3#
- 1...Sa4
- 2.Sxd3#
- 1...Sc4
- 2.Sxd3#
- 1...Sf3
- 2.Rxf5#
- 2.Qxe4#
- 1...Sh3
- 2.Rxf5#
- 2.Qxe4#
- 1...Sf7
- 2.Rxf5#
- 2.Qxe4#
- 1...Sh7
- 2.Rxf5#
- 2.Qxe4#
- 1...g3
- 2.f4#
- 1...Sxe6
- 1.Sc5!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 4
- ADDED MATES = 0
- REMOVED MATES = 5
- Sets
- R(m);N_GUARD::S(H),XR(m)
- R(m);N_GUARD::S(H)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(g);OGATE::R1(G),XP(f)
- S(g);OGATE,XP(I)::R1(G),XP(f)
- P(d);N_GUARD::P(B)
- P(f);P_SPINS(g),SBLOCK::QAB1(D)
- Tries
- Try
- S(C);
- Vars
- S(g);OGATE,XP(I)::R1(G),XP(f)
- R(m);N_GUARD::S(H),XR(m)
- R(m);N_GUARD::S(H)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(g);OGATE::R1(G),XP(f)
- P(d);N_GUARD::P(B)
- Refutation
- P(f);P_SPINS(g)
- Try
- S(C);
- Vars
- S(g);OGATE,XP(I)::R1(G),XP(f)
- R(m);N_GUARD::S(H),XR(m)
- R(m);N_GUARD::S(H)
- S(g);OGATE::R1(G),XP(f)
- P(d);N_GUARD::P(B)
- Refutation
- P(f);P_SPINS(g)
- Try
- S(C);
- Vars
- R(m);N_GUARD::S(H),XR(m)
- R(m);N_GUARD::S(H)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(g);OGATE::R1(G),XP(f)
- P(d);N_GUARD::P(B)
- Refutation
- P(f);P_SPINS(g)
- Try
- B(K);
- Vars
- S(g);OGATE,XP(I)::R1(G),XP(f)
- P(f);P_SPINS(g),SBLOCK::QAB1(D)
- R(m);N_GUARD::S(H),XR(m)
- R(m);N_GUARD::S(H)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(g);OGATE::R1(G),XP(f)
- P(d);N_GUARD::P(B)
- Refutation
- R(m);N_SPINR(i),XB(K)
- Try
- R(E);
- Vars
- S(g);OGATE,XP(I)::R1(G),XP(f)
- R(m);N_GUARD::S(H),XR(m)
- R(m);N_GUARD::S(H)
- S(a);N_GUARD::S(H)
- S(a);N_GUARD::S(H),XS(a)
- S(g);OGATE::R1(G),XP(f)
- P(d);N_GUARD::P(B)
- P(f);P_SPINS(g),SBLOCK::QAB1(D)
- Refutation
- P(h);
- Try
- R(G);XS(g)
- Threat
- DUALS(2)
- Refutation
- B(j);XR(G)
- Try
- Q(D);N_PINP(c),P_PINP(f),XS(g)
- Threat
- QAR1(D),XP(f)
- Vars
- R(m);N_GUARD::S(H)
- Refutation
- B(j);N_SPINP(f),XQ(D)
- Try
- P(B);
- Threat
- P(B)
- Vars
- S(g);OGATE,XP(B)::R1(G),XP(f)
- Refutation
- P(d);XP(B)
- Try
- Actual
- S(C);
- Vars
- P(f);N_GUARD,P_SPINS(g)::QAR1(D),XP(c)
- R(m);N_GUARD::S(C),XR(m)
- R(m);N_GUARD::S(C)
- S(a);N_GUARD::S(C),XP(b)
- P(d);N_GUARD::P(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).