MESON Chess Problem Database

Problem Display
PID: 143059 (2n1B2b/1p5q/3PkP1p/7N/7K/n7/b2p2QB/5R2 w - - 0 1)

Sentac, V

Social Chess Quarterly (The), 1934

2n1B2b/1p5q/3PkP1p/7N/7K/n7/b2p2QB/5R2

#2

8 + 9

SOLUTION

  • SOUND
  • Sets
    • 1...Qb1
      • 2.Qg8#
    • 1...Qc2
      • 2.Qg8#
    • 1...Qd3
      • 2.Qg8#
    • 1...Qe4+
      • 2.Qxe4#
    • 1...Qf5
      • 2.Qg8#
    • 1...Qg8
      • 2.Qe4#
      • 2.Qxg8#
    • 1...Qc7
      • 2.Qe4#
    • 1...Qd7
      • 2.Qe4#
    • 1...Qe7
      • 2.Qe4#
    • 1...Qf7
      • 2.Qe4#
    • 1...Qg7
      • 2.Qe4#
    • 1...Bxf6+
      • 2.Rxf6#
  • Tries
    • 1.Sg7+?
      • 1...Qxg7
        • 2.Qe4#
      • 1...Bxg7!
    • 1.Qh3+?
      • 1...Qf5
        • 2.Qxf5#
      • 1...Kd5!
    • 1.Qe2+?
      • 1...Qe4+
        • 2.Qxe4#
      • 1...Kd5!
    • 1.Qg4+?
      • 1...Qf5
        • 2.Qxf5#
        • 2.Qg8#
      • 1...Kd5!
    • 1.Qg8+?
      • 1...Qf7
        • 2.Qxf7#
      • 1...Qxg8!
  • Keys
    • 1.Rf5!
      • threat
        • 2.Qe4#
      • 1...Bxf6+
        • 2.Rxf6#
      • 1...Kxf5
        • 2.Qg4#
      • 1...Qxf5
        • 2.Qg8#
      • 1...Sxd6
        • 2.Re5#
      • 1...Bb1
        • 2.Qd5#
      • 1...Bd5
        • 2.Qxd5#
      • 1...Sc4
        • 2.Qd5#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 5
    • REMOVED MATES = 9
  • Sets
    • Q(g);N_GUARD::QAB(B)
    • Q(g);CHECK,N_GUARD::QAR2(B),XQ(g)
    • Q(g);N_GUARD::QAR2(B)
    • Q(g);N_GUARD,P_PINP(G)::QAR2(B)
    • B(i);CHECK,OGATE,XP(G)::R1(A),XB(i)
  • Tries
    • Try
      • S(E);CHECK
      • Vars
        • Q(g);XS(E)::QAR2(B)
      • Refutation
        • B(i);XS(E)
    • Try
      • Q(B);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAB1(B),XQ(g)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • Q(g);CHECK,N_GUARD,P_SPINQ(g)::QAR2(B),XQ(g)
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Refutation
        • K(d);S_FLIGHT
    • Try
      • Q(B);CHECK
      • Vars
        • Q(g);N_GUARD,P_SPINQ(g)::QAB1(B),XQ(g)
      • Refutation
        • Q(g);XQ(B)
  • Actual
    • R(A);
    • Threat
      • QAR2(B)
    • Vars
      • B(i);CHECK,OGATE,XP(G)::R1(A),XB(i)
      • K(d);OGATEB,S_FLIGHT,XR(A)::QAB1(B)
      • Q(g);N_GUARD,SBLOCK,XR(A)::QAB(B)
      • S(h);SBLOCK,XP(F)::R1(A)
      • B(a);N_GUARD::QAB1(B)
      • B(a);N_GUARD::QAB1(B),XB(a)
      • S(c);S_CUTB(a)::QAB1(B)
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