MESON Chess Problem Database

Problem Display
PID: 174130 (1b1R4/6N1/1N3p1q/r1pBkp2/p7/K3B2n/6P1/2r1Q3 w - - 0 1)

Buchner, Richard

Arbeiter Schachzeitung, 1927

1b1R4/6N1/1N3p1q/r1pBkp2/p7/K3B2n/6P1/2r1Q3

#2

8 + 10

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Qxe3+
      • 2.Qxe3#
    • 1...Ra1+
      • 2.Qxa1#
    • 1...Rb1
      • 2.Sc4#
      • 2.Qc3#
    • 1...Rd1
      • 2.Sc4#
    • 1...Rxe1
      • 2.Sc4#
    • 1...Rc3+
      • 2.Qxc3#
    • 1...Rc4
      • 2.Sxc4#
  • Tries
    • 1.Se6?
      • threat
        • 2.Bd4#
        • 2.Bf4#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Ra1+
        • 2.Qxa1#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Rxe1
        • 2.Sc4#
      • 1...Qf4
        • 2.Bd4#
        • 2.Bxf4#
      • 1...Sf4
        • 2.Bd4#
        • 2.Bxf4#
      • 1...f4!
    • 1.Bxc1+?
      • 1...Qe3+
        • 2.Qxe3#
      • 1...Kd4!
    • 1.Bf4+?
      • 1...Kd4
        • 2.Qd2#
        • 2.Qe3#
      • 1...Kxf4!
    • 1.Bg5+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Rxe1!
    • 1.Bxh6+?
      • 1...Kd4
        • 2.Qe3#
      • 1...Rxe1!
  • Keys
    • 1.Bf3!
      • threat
        • 2.Rd5#
      • 1...Qxe3+
        • 2.Qxe3#
      • 1...Ra1+
        • 2.Qxa1#
      • 1...Rc3+
        • 2.Qxc3#
      • 1...Qxg7
        • 2.Bxc1#
      • 1...Rd1
        • 2.Sc4#
      • 1...Bd6
        • 2.Sd7#
      • 1...Sf4
        • 2.Bd4#
      • 1...c4
        • 2.Qxa5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 4
    • REMOVED MATES = 2
  • Sets
    • Q(i);CHECK,OGATE,P_SPINQ(i),XB(D)::QAR2(A),XQ(i)
    • R(a);CHECK,OGATE::QAB(A),XR(a)
    • R(a);N_GUARD::S(F)
    • R(a);N_GUARD,XQ(A)::S(F)
    • R(a);CHECK,N_GUARD::QAB(A),XR(a)
    • R(a);N_GUARD::S(F),XR(a)
  • Tries
    • Try
      • S(G);
      • Threat
        • DUALS(2)
      • Vars
        • Q(i);CHECK,OGATE,P_SPINQ(i),XB(D)::QAR2(A),XQ(i)
        • R(a);CHECK,OGATE::QAB(A),XR(a)
        • R(a);CHECK,N_GUARD::QAB(A),XR(a)
        • R(a);N_GUARD,XQ(A)::S(F)
      • Refutation
        • P(g);
    • Try
      • B(D);CHECK,XR(a)
      • Vars
        • Q(i);CHECK,N_GUARD,P_SPINQ(i)::QAR2(A),XQ(i)
      • Refutation
        • K(f);S_FLIGHT
    • Try
      • B(D);CHECK
      • Refutation
        • K(f);S_FLIGHT,XB(D)
    • Try
      • B(D);CHECK
      • Vars
        • K(f);S_FLIGHT::QAB1(A)
      • Refutation
        • R(a);XQ(A)
    • Try
      • B(D);CHECK,XQ(i)
      • Vars
        • K(f);S_FLIGHT::QAB1(A)
      • Refutation
        • R(a);XQ(A)
  • Actual
    • B(E);
    • Threat
      • R1(H)
    • Vars
      • Q(i);CHECK,OGATE,P_SPINQ(i),XB(D)::QAR2(A),XQ(i)
      • R(a);CHECK,OGATE::QAB(A),XR(a)
      • R(a);CHECK,N_GUARD::QAB(A),XR(a)
      • Q(i);N_GUARD,XS(G)::QAR(A)+B(D),XR(a)
      • R(a);N_GUARD::S(F)
      • B(j);SBLOCK::S(F)
      • S(b);SBLOCK::QAR(A)+B(D),DCHECK
      • P(e);OGATEB::QAR(A),XR(d)
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