MESON Chess Problem Database
Problem Display
PID: 220703 (8/1p4pN/1Pb5/2Rn1kNB/2pP3p/2PppKpr/3BP1Pb/5R1Q w - - 0 1)
Usath, Walter
Die Schwalbe, 1928
#2
13 + 12
SOLUTION
- SOUND
- Sets
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...dxe2
- 2.Kxe2#
- 1...exd2
- 2.e4#
- 1...g6
- 2.Bg4#
- 1...Bg1
- Tries
- 1.Se6?
- threat
- 2.Sxg7#
- 1...g5
- 2.Sg7#
- 1...g6
- 2.Sg7#
- 2.Bg4#
- 1...Kxe6!
- threat
- 1.Bc1?
- 1...dxe2
- 2.Kxe2#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...d2!
- 1...dxe2
- 1.Be1?
- 1...dxe2
- 2.Kxe2#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...d2!
- 1...dxe2
- 1.Bxe3?
- 1...dxe2
- 2.Kxe2#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...d2!
- 1...dxe2
- 1.Bf7?
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Be6#
- 1...dxe2!
- 1...exd2
- 1.Rb1?
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...dxe2!
- 1...exd2
- 1.Rc1?
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...dxe2!
- 1...exd2
- 1.Rd1?
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...dxe2!
- 1...exd2
- 1.Re1?
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...dxe2!
- 1...exd2
- 1.Rg1?
- 1...Bxg1
- 2.Qxh3#
- 1...exd2
- 2.e4#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...dxe2!
- 1...Bxg1
- 1.Rf2?
- 1...dxe2
- 2.Qb1#
- 1...exd2
- 2.e4#
- 1...exf2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...gxf2+!
- 1...dxe2
- 1.Ra5?
- 1...dxe2
- 2.Kxe2#
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...Bb5!
- 1...dxe2
- 1.Rb5?
- 1...dxe2
- 2.Kxe2#
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...Bxb5!
- 1...dxe2
- 1.Rxc6?
- threat
- 2.Bg4#
- 2.Bg6#
- 1...Sf4
- 2.Bg4#
- 1...Sf6
- 2.Kxe3#
- 1...Se7
- 2.Kxe3#
- 2.Bg4#
- 1...g6
- 2.Bg4#
- 2.Bxg6#
- 1...bxc6!
- threat
- 1.Qg1?
- 1...dxe2
- 2.Kxe2#
- 1...exd2
- 2.e4#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...Bxg1!
- 1...dxe2
- 1.exd3?
- threat
- 2.Ke2#
- 1...Bg1
- 2.Qxh3#
- 1...e2
- 2.Kxe2#
- 1...cxd3!
- threat
- 1.Se6?
- Keys
- 1.Ra1!
- 1...dxe2
- 2.Qb1#
- 1...exd2
- 2.e4#
- 1...Bg1
- 2.Qxh3#
- 1...Ba4
- 2.Rxd5#
- 1...Bb5
- 2.Rxd5#
- 1...Bd7
- 2.Rxd5#
- 1...Be8
- 2.Rxd5#
- 1...g6
- 2.Bg4#
- 1...dxe2
- 1.Ra1!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 1
- ADDED MATES = 0
- REMOVED MATES = 0
- Sets
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(b);XP(D)::R(A)+K(G),XP(b)
- P(c);OGATE,XB(C)::P(D)
- P(l);SBLOCK::B(K)
- Tries
- Try
- S(J);
- Threat
- S(J),XP(l)
- Vars
- P(l);::S(J)
- Refutation
- K(i);N_SPINS(h),S_FLIGHT,XS(J)
- Try
- B(C);
- Vars
- P(b);XP(D)::R(A)+K(G),XP(b)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);
- Try
- B(C);
- Vars
- P(b);XP(D)::R(A)+K(G),XP(b)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);
- Try
- B(C);XP(c)
- Vars
- P(b);XP(D)::R(A)+K(G),XP(b)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);
- Try
- B(K);
- Vars
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);XP(D)
- Try
- R(A);
- Vars
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);XP(D)
- Try
- R(A);
- Vars
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);XP(D)
- Try
- R(A);
- Vars
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);XP(D)
- Try
- R(A);
- Vars
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);XP(D)
- Try
- R(A);
- Vars
- B(a);OGATE,XR(A)::QAB(B),XR(e)
- P(c);OGATE,XB(C)::P(D)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(b);XP(D)
- Try
- R(A);
- Vars
- P(b);OGATEB,XP(D)::QAB(B)
- P(c);OGATE,XB(C)::P(D)
- P(c);OGATE,XR(A)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- P(d);CHECK,XR(A)
- Try
- R(I);
- Vars
- P(b);XP(D)::R(A)+K(G),XP(b)
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- B(j);N_SPINS(h)
- Try
- R(I);
- Vars
- P(b);XP(D)::R(A)+K(G),XP(b)
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- B(j);N_SPINS(h),XR(I)
- Try
- R(I);N_PINS(h),XB(j)
- Threat
- DUALS(2)
- Vars
- S(h);::B(K)
- S(h);::R(A)+K(G),XP(c)
- Refutation
- P(k);XR(I)
- Try
- Q(B);
- Vars
- P(b);XP(D)::R(A)+K(G),XP(b)
- P(c);OGATE,XB(C)::P(D)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
- Refutation
- B(a);XQ(B)
- Try
- P(D);XP(b)
- Threat
- R(A)+K(G)
- Vars
- B(a);OGATE::QAB(B),XR(e)
- P(c);::R(A)+K(G),XP(c)
- Refutation
- P(f);XP(D)
- Try
- Actual
- R(A);
- Vars
- P(b);OGATEB,XP(D)::QAB(B)
- P(c);OGATE,XB(C)::P(D)
- B(a);OGATE::QAB(B),XR(e)
- B(j);N_GUARD::R(I),XS(h)
- P(l);SBLOCK::B(K)
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).