MESON Chess Problem Database

Problem Display
PID: 174824 (7B/4p3/1N2pb2/8/1Q1Pk1B1/1R4pN/bKPPr1P1/2n5 w - - 0 1)

Barth, Michael

Freie Presse, 1995

7B/4p3/1N2pb2/8/1Q1Pk1B1/1R4pN/bKPPr1P1/2n5

#2

11 + 8

6490 yacpdb 2018

SOLUTION

  • SOUND
  • Sets
    • 1...Rf2
      • 2.Re3#
    • 1...Rxg2
      • 2.Re3#
    • 1...Re3
      • 2.Rxe3#
    • 1...Bxd4+
      • 2.Qxd4#
    • 1...Bh4
      • 2.d5#
    • 1...Be5
      • 2.dxe5#
    • 1...Bg5
      • 2.d5#
    • 1...Sd3+
      • 2.cxd3#
    • 1...e5
      • 2.d5#
  • Tries
    • 1.Sg5+?
      • 1...Bxg5
        • 2.d5#
      • 1...Kf4!
    • 1.Rf3?
      • threat
        • 2.Rf4#
      • 1...Bxd4+
        • 2.Qxd4#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Rf2
        • 2.Re3#
      • 1...Be5
        • 2.Sg5#
      • 1...Bg5
        • 2.Sxg5#
      • 1...e5
        • 2.Bf5#
      • 1...Rxd2!
    • 1.Qd6?
      • threat
        • 2.Qf4#
      • 1...Bxd4+
        • 2.Qxd4#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Rf2
        • 2.Re3#
      • 1...Be5
        • 2.Qxe5#
      • 1...Bg5
        • 2.Sxg5#
        • 2.Qe5#
        • 2.Qc6#
        • 2.Qxe6#
      • 1...e5
        • 2.Qd5#
      • 1...exd6!
  • Keys
    • 1.Qc5!
      • threat
        • 2.Bf3#
      • 1...Bxd4+
        • 2.Qxd4#
      • 1...Sd3+
        • 2.cxd3#
      • 1...Rf2
        • 2.Re3#
      • 1...Re3
        • 2.Rxe3#
      • 1...Be5
        • 2.Qxe5#
      • 1...e5
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 2
    • ADDED MATES = 0
    • REMOVED MATES = 3
  • Sets
    • R(c);N_GUARD::R1(E)
    • R(c);N_GUARD,XP(D)::R1(E)
    • R(c);N_GUARD::R1(E),XR(c)
    • B(g);CHECK,OGATE,P_SPINB(g),XP(H)::QAR1(G),XB(g)
    • B(g);N_PINP(H)::QAR(G)+P(H)
    • B(g);::QAR(G)+P(H),XB(g)
    • S(a);CHECK,OGATE::P(B),XS(a)
    • P(f);N_PINP(H),SBLOCK::QAR(G)+P(H)
  • Tries
    • Try
      • S(F);CHECK
      • Vars
        • B(g);N_PINP(H),XS(F)::QAR(G)+P(H)
      • Refutation
        • K(e);P-FLIGHT
    • Try
      • R(E);
      • Threat
        • R1(E)
      • Vars
        • B(g);CHECK,OGATE,P_SPINB(g),XP(H)::QAR1(G),XB(g)
        • S(a);CHECK,OGATE::P(B),XS(a)
        • R(c);N_GUARD::R1(E)
        • B(g);N_GUARD::S(F)
        • B(g);N_GUARD,N_PINP(H)::S(F),XB(g)
        • P(f);N_GUARD,N_PINP(H)::B(I)
      • Refutation
        • R(c);N_PINP(H),P_PINP(B),XP(C)
    • Try
      • Q(G);
      • Threat
        • QAR1(G)
      • Vars
        • B(g);CHECK,OGATE,XP(H)::QAR1(G),XB(g)
        • S(a);CHECK,OGATE::P(B),XS(a)
        • R(c);N_GUARD::R1(E)
        • B(g);N_GUARD::QAR1(G),XB(g)
        • P(f);N_GUARD,N_PINP(H)::QAB1(G)
      • Refutation
        • P(h);XQ(G)
  • Actual
    • Q(G);
    • Threat
      • B(I)
    • Vars
      • B(g);CHECK,OGATE,XP(H)::QAR1(G),XB(g)
      • S(a);CHECK,OGATE::P(B),XS(a)
      • R(c);N_GUARD::R1(E)
      • R(c);N_GUARD::R1(E),XR(c)
      • B(g);N_GUARD::QAR1(G),XB(g)
      • P(f);N_GUARD,N_PINP(H)::QAB1(G)
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