MESON Chess Problem Database
Problem Display
PID: 164280 (8/4p1p1/8/2qPP3/1pp1RBB1/6NK/3Ppkpp/Q3rrbR w - - 0 1)
Gross, Erwin
Die Schwalbe, 1970
#2
10 + 12
SOLUTION
- SOUND
- Sets
- 1...Qe3
- 2.Bxe3#
- 1...Qd4
- 2.Qxd4#
- 1...Qd6
- 2.Be3#
- 2.Qd4#
- 1...Qa7
- 2.Qxa7#
- 1...Qa5
- 2.Be3#
- 2.Qd4#
- 1...Qb5
- 2.Be3#
- 2.Qd4#
- 1...Qxd5
- 2.Be3#
- 1...Qc6
- 2.Be3#
- 2.Qd4#
- 1...Qc7
- 2.Be3#
- 2.Qd4#
- 1...Qc8
- 2.Be3#
- 2.Qd4#
- 1...Rxa1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...gxh1Q
- 2.Sxh1#
- 1...gxh1S
- 2.Sxh1#
- 1...gxh1B
- 2.Sxh1#
- 1...gxh1R
- 2.Sxh1#
- 1...Qe3
- Tries
- 1.Sxe2?
- threat
- 2.Bg3#
- 1...Qe3+
- 2.Bxe3#
- 1...gxh1S!
- threat
- 1.Sf5?
- threat
- 2.Bg3#
- 1...Qe3+
- 2.Bxe3#
- 1...gxh1S!
- threat
- 1.Sh5?
- threat
- 2.Bg3#
- 1...Qe3+
- 2.Bxe3#
- 1...gxh1S!
- threat
- 1.Bh6?
- threat
- 2.Rf4#
- 1...Qxd5
- 2.Be3#
- 1...Rxa1
- 2.Rxe2#
- 1...gxh1Q
- 2.Sxh1#
- 1...gxh1B
- 2.Sxh1#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qe3
- 2.Bxe3#
- 1...Qd4
- 2.Qxd4#
- 1...g5!
- threat
- 1.Rxh2?
- threat
- 2.Sh1#
- 2.Rxg2#
- 1...Rxa1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qe3
- 2.Bxe3#
- 2.Rxg2#
- 1...Bxh2!
- threat
- 1.Re3?
- threat
- 2.Se4#
- 2.Rf3#
- 1...Qxe3
- 2.Bxe3#
- 1...Rxa1
- 2.Rxe2#
- 1...gxh1Q
- 2.Sxh1#
- 1...gxh1B
- 2.Sxh1#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qd4
- 2.Rf3#
- 1...Qxd5!
- threat
- 1.Qc3?
- threat
- 2.Qf3#
- 1...gxh1Q
- 2.Sxh1#
- 1...gxh1B
- 2.Sxh1#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 1...bxc3!
- threat
- 1.Qa5?
- threat
- 2.Qxc5#
- 1...Qxa5
- 2.Be3#
- 1...Qxd5
- 2.Be3#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qb6
- 2.Qxb6#
- 1...Qe3
- 2.Bxe3#
- 1...Qd6
- 2.Be3#
- 1...Qa7
- 2.Qxa7#
- 1...Qb5
- 2.Be3#
- 1...Qc6
- 2.Be3#
- 1...Qc7
- 2.Be3#
- 1...Qc8
- 2.Be3#
- 1...Qd4!
- threat
- 1.Qa7?
- threat
- 2.Qxc5#
- 1...Ra1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qb6
- 2.Qxb6#
- 1...Qe3
- 2.Bxe3#
- 2.Qxe3#
- 1...Qd4
- 2.Qxd4#
- 1...Qxa7!
- threat
- 1.d4?
- threat
- 2.Be3#
- 1...Qxd4
- 2.Qxd4#
- 1...Rxa1
- 2.Rxe2#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...cxd4 ep!
- threat
- 1.Sxe2?
- Keys
- 1.Bg5!
- threat
- 2.Rf4#
- 1...Qxd5
- 2.Be3#
- 1...Rxa1
- 2.Rxe2#
- 1...gxh1Q
- 2.Sxh1#
- 1...gxh1B
- 2.Sxh1#
- 1...Rb1
- 2.Rxe2#
- 1...Rc1
- 2.Rxe2#
- 1...Rd1
- 2.Rxe2#
- 1...Qe3
- 2.Bxe3#
- 1...Qd4
- 2.Qxd4#
- threat
- 1.Bg5!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 0
- REMOVED MATES = 3
- Sets
- Q(j);N_GUARD,P_PINS(D)::B(G),XQ(j)
- Q(j);N_GUARD::QAB(A),XQ(j)
- Q(j);OGATEB::QAB(A),XQ(j)
- Q(j);N_GUARD,XP(I)::B(G)
- R(a);N_GUARD,XQ(A)::R1(F),XP(d)
- R(a);N_GUARD::R1(F),XP(d)
- P(f);XR(B)::S(D),XQ(f)
- P(f);XR(B)::S(D),XS(f)
- P(f);XR(B)::S(D),XB(f)
- P(f);XR(B)::S(D),XR(f)
- Tries
- Try
- S(D);XP(d)
- Threat
- B(G)
- Vars
- Q(j);CHECK,N_GUARD::B(G),XQ(j)
- Refutation
- P(f);XR(B)
- Try
- S(D);
- Threat
- B(G)
- Vars
- Q(j);CHECK,N_GUARD::B(G),XQ(j)
- Refutation
- P(f);XR(B)
- Try
- S(D);
- Threat
- B(G)
- Vars
- Q(j);CHECK,N_GUARD::B(G),XQ(j)
- Refutation
- P(f);XR(B)
- Try
- B(G);
- Threat
- R(F)
- Vars
- Q(j);N_GUARD,XP(I)::B(G)
- R(a);N_GUARD,XQ(A)::R1(F),XP(d)
- P(f);XR(B)::S(D),XQ(f)
- P(f);XR(B)::S(D),XB(f)
- R(a);N_GUARD::R1(F),XP(d)
- Q(j);N_GUARD,P_PINS(D)::B(G),XQ(j)
- Q(j);N_GUARD::QAB(A),XQ(j)
- Refutation
- P(l);
- Try
- R(B);P_PINP(f),XP(g)
- Threat
- DUALS(2)
- Vars
- R(a);N_GUARD,XQ(A)::R1(F),XP(d)
- R(a);N_GUARD::R1(F),XP(d)
- Refutation
- B(c);N_SPINP(f),XR(B)
- Try
- R(F);
- Threat
- DUALS(2)
- Vars
- Q(j);OGATE,P_PINS(D),XR(F)::B(G),XQ(j)
- R(a);N_GUARD,XQ(A)::R1(F),XP(d)
- P(f);XR(B)::S(D),XQ(f)
- P(f);XR(B)::S(D),XB(f)
- R(a);N_GUARD::R1(F),XP(d)
- Q(j);::R1(F)
- Refutation
- Q(j);XP(I)
- Try
- Q(A);
- Threat
- QAR1(A)
- Vars
- P(f);XR(B)::S(D),XQ(f)
- P(f);XR(B)::S(D),XB(f)
- R(a);N_GUARD::R1(F),XP(d)
- Refutation
- P(h);XQ(A)
- Try
- Q(A);
- Threat
- QAB(A),XQ(j)
- Vars
- Q(j);N_GUARD,XQ(A)::B(G)
- Q(j);N_GUARD,XP(I)::B(G)
- R(a);N_GUARD::R1(F),XP(d)
- Q(j);OGATEB::QAB(A),XQ(j)
- Q(j);N_GUARD,P_PINS(D)::B(G),XQ(j)
- Q(j);N_GUARD::B(G)
- Q(j);N_GUARD,P_PINB(H)::B(G)
- Refutation
- Q(j);
- Try
- Q(A);P_PINQ(j)
- Threat
- QAB(A),XQ(j)
- Vars
- R(a);N_GUARD::R1(F),XP(d)
- Q(j);OGATEB::QAB(A),XQ(j)
- Q(j);OGATE::QAB(A),XQ(j)
- Refutation
- Q(j);N_SPINQ(j),XQ(A)
- Try
- P(C);
- Threat
- B(G)
- Vars
- Q(j);OGATE,XP(C)::QAB(A),XQ(j)
- R(a);N_GUARD,XQ(A)::R1(F),XP(d)
- R(a);N_GUARD::R1(F),XP(d)
- Refutation
- P(i);EP,XP(C)
- Try
- Actual
- B(G);
- Threat
- R(F)
- Vars
- Q(j);N_GUARD,XP(I)::B(G)
- R(a);N_GUARD,XQ(A)::R1(F),XP(d)
- P(f);XR(B)::S(D),XQ(f)
- P(f);XR(B)::S(D),XB(f)
- R(a);N_GUARD::R1(F),XP(d)
- Q(j);N_GUARD,P_PINS(D)::B(G),XQ(j)
- Q(j);N_GUARD::QAB(A),XQ(j)
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).