MESON Chess Problem Database
Problem Display
PID: 271388 (8/1pR2p2/2pB1Kn1/bN6/P1k1B3/P1P1pN2/1Q6/2n5 w - - 0 1)
Gevers, Raymond
Die Schwalbe, 1932
#2
10 + 8
SOLUTION
- SOUND
- Sets
- 1...Bxc3+
- 2.Qxc3#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 1...Bxc7
- 2.Qb4#
- 1...Sa2
- 2.Qxa2#
- 1...Se2
- 2.Qa2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qa2#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...e2
- 2.Sd2#
- 1...c5
- 2.Rxc5#
- 1...b6
- 2.Rxc6#
- 1...Bxc3+
- Tries
- 1.Kxf7?
- 1...Se5+
- 2.Sxe5#
- 1...Bxc3
- 2.Qxc3#
- 1...Bxc7
- 2.Qb4#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 1...Sa2
- 2.Qxa2#
- 1...Se2
- 2.Qa2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qa2#
- 1...Sf4
- 2.Se5#
- 1...Sh4
- 2.Se5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...e2
- 2.Sd2#
- 1...c5
- 2.Rxc5#
- 1...b6
- 2.Rxc6#
- 1...Sh8+!
- 1...Se5+
- 1.Bd3+?
- 1...Kd5
- 2.c4#
- 1...Sxd3
- 2.Qa2#
- 1...Kxd3!
- 1...Kd5
- 1.Bd5+?
- 1...Kd3
- 2.Se1#
- 1...Kxd5!
- 1...Kd3
- 1.Bb4?
- threat
- 2.Sd6#
- 1...Bxb4
- 2.Qxb4#
- 1...Bxc7!
- threat
- 1.Be7?
- 1...Bxc3+
- 2.Qxc3#
- 1...Bxc7
- 2.Qb4#
- 1...Sf4
- 2.Se5#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 1...Sa2
- 2.Qxa2#
- 1...Se2
- 2.Qa2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qa2#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...e2
- 2.Sd2#
- 1...c5
- 2.Sd6#
- 2.Rxc5#
- 1...b6
- 2.Rxc6#
- 1...Sxe7!
- 1...Bxc3+
- 1.Rc8?
- 1...Bxc3+
- 2.Qxc3#
- 1...Sf4
- 2.Se5#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 1...Bc7
- 2.Qb4#
- 1...Sa2
- 2.Qxa2#
- 1...Se2
- 2.Qa2#
- 1...Sb3
- 2.Qe2#
- 1...Sd3
- 2.Qa2#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...e2
- 2.Sd2#
- 1...c5
- 2.Rxc5#
- 1...b6
- 2.Rxc6#
- 1...Bd8+!
- 1...Bxc3+
- 1.Qb1?
- 1...Bxc7
- 2.Qb4#
- 1...Sf4
- 2.Se5#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 1...Sa2
- 2.Qxa2#
- 1...Se2
- 2.Qa2#
- 1...Sb3
- 2.Qd3#
- 1...Sd3
- 2.Qa2#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...e2
- 2.Sd2#
- 1...c5
- 2.Rxc5#
- 1...b6
- 2.Rxc6#
- 1...Bxc3+!
- 1...Bxc7
- 1.Qa2+?
- 1...Sb3
- 2.Qe2#
- 1...Sxa2!
- 1...Sb3
- 1.Kxf7?
- Keys
- 1.Sbd4!
- 1...Bxc3
- 2.Qb5#
- 1...Bxc7
- 2.Qb4#
- 1...Sf4
- 2.Se5#
- 1...Bb4
- 2.Qxb4#
- 1...Bb6
- 2.Qb4#
- 1...Sa2
- 2.Qb3#
- 1...Se2
- 2.Qb3#
- 1...Sb3
- 2.Qxb3#
- 1...Sd3
- 2.Qb3#
- 1...Sh4
- 2.Se5#
- 1...Se5
- 2.Sxe5#
- 1...Se7
- 2.Se5#
- 1...Sf8
- 2.Se5#
- 1...Sh8
- 2.Se5#
- 1...e2
- 2.Sd2#
- 1...c5
- 2.Rxc5#
- 1...b5
- 2.Rxc6#
- 1...b6
- 2.Rxc6#
- 1...Bxc3
- 1.Sbd4!
FEATURES
- Static
- TYPE = MUTATE
- CHANGED MATES = 5
- ADDED MATES = 1
- REMOVED MATES = 0
- Sets
- B(d);CHECK,OGATE,XP(C)::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A)
- B(d);N_GUARD,N_SPINP(e),XR(J)::QAR1(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD,SBLOCK::QAB(A)
- S(f);N_GUARD::S(D)
- S(f);N_GUARD::S(D),XS(f)
- P(b);N_GUARD::S(D)
- P(e);OGATE::R1(J),XP(e)
- P(g);N_GUARD::R(J),XP(e)
- Tries
- Try
- K(I);P-FLIGHT,XP(h)
- Vars
- S(f);CHECK,N_GUARD::S(D),XS(f)
- B(d);OGATE,XP(C)::QAR1(A),XB(d)
- B(d);N_GUARD,N_SPINP(e),XR(J)::QAR1(A)
- B(d);N_GUARD::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD,SBLOCK::QAB(A)
- S(f);N_GUARD::S(D)
- P(b);N_GUARD::S(D)
- P(e);OGATE::R1(J),XP(e)
- P(g);N_GUARD::R(J),XP(e)
- Refutation
- S(f);CHECK
- Try
- B(F);CHECK
- Vars
- K(c);N_SPINP(e),OGATE,S_FLIGHT::P(C)
- S(a);SBLOCK,XB(F)::QAB(A)
- Refutation
- K(c);N_SPINP(e),S_FLIGHT,XB(F)
- Try
- B(F);CHECK
- Vars
- K(c);N_GUARD,N_SPINP(e),S_FLIGHT::S(D)
- Refutation
- K(c);N_SPINP(e),S_FLIGHT,XB(F)
- Try
- B(H);
- Threat
- S(G)
- Vars
- B(d);OGATE,XB(H)::QAR1(A),XB(d)
- Refutation
- B(d);N_SPINP(e),XR(J)
- Try
- B(H);
- Vars
- B(d);CHECK,OGATE,XP(C)::QAR1(A),XB(d)
- B(d);N_GUARD,N_SPINP(e),XR(J)::QAR1(A)
- S(f);N_GUARD::S(D)
- B(d);N_GUARD::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD,SBLOCK::QAB(A)
- S(f);N_GUARD::S(D),XS(f)
- P(b);N_GUARD::S(D)
- P(g);N_GUARD::R(J),XP(e)
- Refutation
- S(f);XB(H)
- Try
- R(J);
- Vars
- B(d);CHECK,OGATE,XP(C)::QAR1(A),XB(d)
- S(f);N_GUARD::S(D)
- B(d);N_GUARD::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A)
- B(d);N_GUARD,N_SPINP(e)::QAR1(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD,SBLOCK::QAB(A)
- S(f);N_GUARD::S(D),XS(f)
- P(b);N_GUARD::S(D)
- P(e);OGATE::R1(J),XP(e)
- P(g);N_GUARD::R(J),XP(e)
- Refutation
- B(d);CHECK
- Try
- Q(A);
- Vars
- B(d);N_GUARD,N_SPINP(e),XR(J)::QAR1(A)
- S(f);N_GUARD::S(D)
- B(d);N_GUARD::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAB(A),XS(a)
- S(a);N_GUARD::QAB(A)
- S(a);N_GUARD,SBLOCK::QAB1(A)
- S(f);N_GUARD::S(D),XS(f)
- P(b);N_GUARD::S(D)
- P(e);OGATE::R1(J),XP(e)
- P(g);N_GUARD::R(J),XP(e)
- Refutation
- B(d);CHECK,XP(C)
- Try
- Q(A);CHECK
- Vars
- S(a);N_GUARD,P_SPINS(a),SBLOCK::QAB(A)
- Refutation
- S(a);XQ(A)
- Try
- Actual
- S(G);
- Vars
- B(d);P_PINS(G),SBLOCK,XP(C)::QAB1(A)
- B(d);N_GUARD,N_SPINP(e),XR(J)::QAR1(A)
- S(f);N_GUARD::S(D)
- B(d);N_GUARD::QAR1(A),XB(d)
- B(d);N_GUARD::QAR1(A)
- S(a);N_GUARD::QAB1(A)
- S(a);N_GUARD::QAB1(A),XS(a)
- S(f);N_GUARD::S(D),XS(f)
- P(b);N_GUARD::S(D)
- P(e);OGATE::R1(J),XP(e)
- P(g);N_GUARD::R(J),XP(e)
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).