Meson Chess Problem Database

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Problem Display

PID: 40777 (1BRK1n2/1P2p2p/b5p1/r1NB1R1q/P2k1P2/3P4/2Qb1P2/1r2N3 w - - 0 1)

Jorgensen, Walther Martinus Johannes

1st Prize, Magasinet, 1947

1BRK1n2/1P2p2p/b5p1/r1NB1R1q/P2k1P2/3P4/2Qb1P2/1r2N3

13 + 10

3105	FIDE Album (1945-1955)	1964
15593	170 Skakopgaver (Jorgensen)	1975
1099	WCSC	1992
5396	World Chess Solving Championship 1977-1996	1997

SOLUTION

SOUND
Sets
- 1...Qf3
  - 2.Sxf3#
- 1...Qh2
  - 2.Sf3#
- 1...Qh4
  - 2.Sf3#
- 1...Qg5
  - 2.Sf3#
- 1...Qh6
  - 2.Sf3#
- 1...Ra1
  - 2.Sb3#
- 1...Rc1
  - 2.Sb3#
- 1...Rd1
  - 2.Sb3#
- 1...Rxe1
  - 2.Sb3#
- 1...Rb3
  - 2.Sxb3#
- 1...Rbb5
  - 2.Qc4#
- 1...Rab5
  - 2.Qc4#
- 1...Rxc5
  - 2.Qxc5#
- 1...Bxd3
  - 2.Qxd3#
- 1...Bc4
  - 2.Qxc4#
- 1...Bxb7
  - 2.Qc4#
- 1...Se6+
  - 2.Sxe6#
- 1...Sd7
  - 2.Se6#
Tries
- 1.Bg2?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Qf3
    - 2.Sxf3#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...Qxf5!
- 1.Bb3?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxb3
    - 2.Sxb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Bc4
    - 2.Qxc4#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...Rxe1!
- 1.Bf3?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf3
    - 2.Sxf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...Qxf5!
- 1.Bc4?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Bxc4
    - 2.Qxc4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...Rxc5!
- 1.Be4?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...Bxf4!
- 1.Bc6?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Bc4
    - 2.Qxc4#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...Bc3!
- 1.Be6?
  - threat
    - 2.Be5#
  - 1...Sxe6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Sd7!
- 1.Bf7?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...e6!
- 1.Bg8?
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#
  - 1...e6!
- 1.Qb3?
  - threat
    - 2.Sc2#
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sc2#
    - 2.Sf3#
  - 1...Rxb3
    - 2.Sxb3#
  - 1...Rxc5
    - 2.Be5#
  - 1...Bxe1
    - 2.Be5#
  - 1...Bxf4
    - 2.Sc2#
    - 2.Rxf4#
  - 1...Bxd3
    - 2.Be5#
    - 2.Qxd3#
  - 1...Qd1
    - 2.Be5#
  - 1...Qe2
    - 2.Sc2#
  - 1...Rc1
    - 2.Be5#
  - 1...Rb2
    - 2.Be5#
  - 1...Bc4
    - 2.Sc2#
    - 2.Qxc4#
  - 1...Sd7
    - 2.Sc2#
    - 2.Se6#
  - 1...e5
    - 2.Sc2#
    - 2.Bxe5#
  - 1...Rxe1!
- 1.Qb2+?
  - 1...Bc3
    - 2.Sc2#
    - 2.Sb3#
  - 1...Rxb2!
- 1.Qc3+?
  - 1...Bxc3
    - 2.Sc2#
  - 1...Kxc3!
Keys
- 1.Ba2!
  - threat
    - 2.Be5#
  - 1...Se6+
    - 2.Sxe6#
  - 1...Qxf5
    - 2.Sf3#
  - 1...Rxe1
    - 2.Sb3#
  - 1...Rxc5
    - 2.Qxc5#
  - 1...Bxf4
    - 2.Rxf4#
  - 1...Qe2
    - 2.Rd5#
  - 1...Rb3
    - 2.Sxb3#
  - 1...Bc4
    - 2.Qxc4#
  - 1...Sd7
    - 2.Se6#
  - 1...e5
    - 2.Bxe5#

FEATURES

Static
- TYPE = THREAT
- CHANGED MATES = 0
- ADDED MATES = 4
- REMOVED MATES = 12
Sets
- Q(e);N_GUARD::S(A),XQ(e)
- Q(e);N_GUARD::S(A)
- R(a);N_GUARD::S(G)
- R(a);N_GUARD,XS(A)::S(G)
- R(a);N_GUARD::S(G),XR(a)
- R(a);S_CUTB(f)::QAR1(B)
- R(d);S_CUTB(f)::QAR1(B)
- R(d);OGATE,XS(G)::QAB1(B),XR(d)
- B(f);OGATE,XP(D)::QAR1(B),XB(f)
- B(f);N_GUARD::QAR1(B),XB(f)
- B(f);N_GUARD,XP(J)::QAR1(B)
- S(j);CHECK,N_GUARD::S(G),XS(j)
- S(j);N_GUARD::S(G)
Tries
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - R(a);N_GUARD,XS(A)::S(G)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - Q(e);N_GUARD::R1(I)
    - Q(e);N_GUARD::S(A),XQ(e)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - Q(e);XR(I)
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(a);XB(H)::S(G),XR(a)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - Q(e);N_GUARD::R1(I)
    - B(f);N_GUARD::QAR1(B),XB(f)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - R(a);XS(A)
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);XB(H)::S(A),XQ(e)
    - R(a);N_GUARD,XS(A)::S(G)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - Q(e);XR(I)
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(a);N_GUARD,XS(A)::S(G)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - B(f);OGATE,XB(H)::QAR1(B),XB(f)
    - Q(e);N_GUARD::R1(I)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - R(d);XS(G)
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - B(b);XP(F)
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(a);N_GUARD,XS(A)::S(G)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - Q(e);N_GUARD::R1(I)
    - B(f);N_GUARD::QAR1(B),XB(f)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - B(b);
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,XB(H)::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(a);N_GUARD,XS(A)::S(G)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - Q(e);N_GUARD::R1(I)
  - Refutation
    - S(j);
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(a);N_GUARD,XS(A)::S(G)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - Q(e);N_GUARD::R1(I)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - P(h);
- Try
  - B(H);
  - Threat
    - B(K)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - Q(e);N_GUARD,XR(I)::S(A)
    - R(a);N_GUARD,XS(A)::S(G)
    - R(d);OGATE,XS(G)::QAB1(B),XR(d)
    - B(b);OGATE,XP(F)::R(I),XB(b)
    - Q(e);N_GUARD::R1(I)
    - S(j);N_GUARD::S(G)
    - P(h);::B(K),XP(h)
  - Refutation
    - P(h);
- Try
  - Q(B);
  - Threat
    - DUALS(2)
  - Vars
    - S(j);CHECK,N_GUARD::S(G),XS(j)
    - R(a);XQ(B)::S(G),XR(a)
    - R(d);XS(G)::B(K)
    - B(b);XS(A)::B(K)
    - Q(e);::B(K)
    - Q(e);::S(A)
    - R(a);::B(K)
  - Refutation
    - R(a);XS(A)
- Try
  - Q(B);CHECK
  - Refutation
    - R(a);XQ(B)
- Try
  - Q(B);CHECK
  - Vars
    - B(b);SBLOCK,XQ(B)::S(A)
  - Refutation
    - K(c);S_FLIGHT,XQ(B)
Actual
- B(H);
- Threat
  - B(K)
- Vars
  - S(j);CHECK,N_GUARD::S(G),XS(j)
  - Q(e);N_GUARD,XR(I)::S(A)
  - R(a);N_GUARD,XS(A)::S(G)
  - R(d);OGATE,XS(G)::QAB1(B),XR(d)
  - B(b);OGATE,XP(F)::R(I),XB(b)
  - Q(e);N_GUARD::R1(I)
  - R(a);N_GUARD::S(G),XR(a)
  - B(f);N_GUARD::QAR1(B),XB(f)
  - S(j);N_GUARD::S(G)
  - P(h);::B(K),XP(h)

MESON Chess Problem Database

Problem Display

PID: 40777 (1BRK1n2/1P2p2p/b5p1/r1NB1R1q/P2k1P2/3P4/2Qb1P2/1r2N3 w - - 0 1)

SOLUTION

FEATURES